is it true that Bigbom Eco has its own cryptocurrency?
Yea, It is called BBO Token.
Each new startup creates its own cryptocurrency. Is it just a modern trend? Have they any real reasons to do it?
BBO, implements using ERC-20 standard, is the main utility for transactions under Bigbom Ecos ecosystem. The reason project has its token is they wanted to have better ownership,and make it easier for users on the ecosystem.