Taxes in Belgium

Hi everyone,

I've bought some altcoins couple of months ago and I want to withdraw some of that money as profit.

Now, I don't know anything about possible taxes on cryptocurrencies in Belgium.
I know there are taxes on profit you make with shares but are altcoins shares?

Anyone who has an idea about the possible tax rate?

Could also be interesting for other people in other countries, because the laws in the countries are not always updated.

Upvote and comment about this topic please.