I can agree with that, the ease of transaction is mainly the advantage for me when you are talking crypto. Based from the OP's graph, the large contributing part are scams and I think that's true. So many crap and scam projects, promising overwhelming returns, etc. but they will disappear once they got their money. This is the sad reality in crypto. But they are lessening now as less and less investors are joining these ICOs, IEOs, STOs or whatever your call it and especially now that we are in crisis. I hope these crap projects will be gone forever.
There are still many people who do illegal in crypto transactions, they use it for their own interests and also acts of cheating in various ways, for example, scamer who continues to deceive people into selling tokens or other things.
But no one would have thought that even crypto is often used for crimes in funding terrorists, money laundering and other fraudulent matters so this transaction is still polemic until now because some countries are still afraid of it, could the state be able to control the blockchain so I sure they will implement it to become a mass adoption.