For the last 10 years I have collected coins from all over the world.

You need agreement with tense.

Some countries like to show their sightseeingfamous sites on the coins, or display national animals or /plants.

Also don't forget about stathe symbolic and awesome design of the coin you might encounter.

In other words, one small coin can tell you a lot about the country and time, where and when it was used.

And that's only athe beginning.

Also my hobby helped me findmake new friends.

We often trade coins with each other, share experience and knowledge we get along our way.

I'm grateful to myself that one day I started to collect coins and learn about them.

For the last 10 years I have collected coins from all over the world.

Each coin can tell you the period of time when it was used,; what country is it from,; what metal is it made from.

Semi-colons ; are used more often than commas , to separate larger items on a list.

A coin usually shows a ruler or a famous person of the country at that time.

Nouns need articles most of the time : the, a, an, some etc

Meterial often represents the current economy situation of the country - the worse the metal, the poorer the country was.

Some countries like to show their sightseeing on the coins, or display national animals or plants.

We often trade coins with each other, share experiences and knowledge we getthat we have gotten on our way.

For the last 10 years, I have collected coins from all over the world.

First of all, I would like to describe to you the science of numismatics.

It's a very peculiar area that overlapencompasses history, enconomy, culture, and politics.

Each coin can tell you the period of time of when it was used, what country is itt's from, and what metal is itt's made ofrom.

A coin usually shows the ruler or famous person of the country at that time.

MeThe material often represents the current economy situation of the country - the worse the metal, the poorer the country was.

Some countries like to show their sightseeing on their coins, or display national animals or /plants.

Also, don't forget about the state symbolics and awesome designs of the coin that you might encounter.

In other words, one small coin can tell you a lot about the country and time of where and when it was used.

I've got about 10.,000 coins from 97 different countries.

And that's only athe beginning.

Also my hobby has helped me to find new friends.

We often trade coins with each other, share experiences and knowledge that we get on our way.

I'm grateful to myself that one dayhat I started to collect coins and learn them.

For the last 10 years I've collected coins from all over the world.

First of all, I would like to describe you the science of numismatics.

It's very peculiar area that overlaps history, enconomy, culture and politics.

Each coin can tell you the period of time when it was used, what country is it from, and what metal is it made from.

A coin usually shows a ruler or famous person of the country at that time.

Meaterial often represents the current economy situation of the country - the worse the metal, the poorer country was.

Some countries like to show their sightseeing on the coins, display national animals, or plants.

Also don't forget about state symbolics and awesome designs of the coins you might encounter.

I wasn't sure what you meant here. Did I get it right?

In other words, one small coin can tell you a lot about the country and time where and when it was used.

I've got about 10.,000 coins from 97 different countries.

Use commas to denote powers of ten in numbers. Periods are reserved for fractional numbers:

The euro is worth 1.05 dollars.
I won 1,493,298 dollars at the casino.

And that's only athe beginning.

For the last 10 years, I have been collecting coins from all over the world.

Including the amount of time changes the verb tense. "I collect coins from all over the world." or "I have been collecting coins for a long time"

First of all, I would like to describe you the science of numismatics to you.

You need the "to" here.

It's a very peculiar area that overlaps history, enconomyics, culture and politics.

Each coin can tell you the period of time when it was used, what country ist its from, and what metal ist its made from.

A coin usually shows a ruler or famous person of the country at that time.

MeThe material often represents the current economyic situation of the country -; the worse the metal, the poorer country was.

A '-' isn't used in this case. It would be good to use two sentences.

Some countries like to show their sightseeinglandmarks on the coins, or display national animals or plants.

Since there is no verb with plants, 'display national animals or plants' is one phrase.

Also, don't forget about the state symbolicsm and awesome design of the coin you might encounter.

In other words, one small coin can tell you a lot about the country and time where and whenin which it was used.

which works for both 'country' and 'time'

I've got about 10.,000 coins from 97 different countries, and that's only a beginning.

And that's only a beginning.

Sentences can't begin with 'and'.

Also, my hobby helped me find new friends.

If you don't want to use a comma, "My hobby also helped me find new friends."

We often trade coins with each other, and share the experience and knowledge we get on our way.

Same as above. There is no verb with 'knowledge'.

I'm grateful to myself that one day I started to collect coins and learn about them.