Yes, You're right if all the fraudsters are gets rid off from the cryptocurrency market then cryptocurrencies can become the most popular money in the world. but there are still of many interesting projects which are trying to give their best to the world like this :-https://bitcointalk.org/index.php?topic=5180115.0
It's just a purse is in fact not similar projects . therefore, it is necessary to clearly understand how it will all work in practice.