Crypto-currency markets are more accessible for traders, there are no such restrictions as in the stock market
Yes, in the cryptocurrency market, a trader has the opportunity not to provide personal data; the trader has the ability to trade around the clock, withdraw their assets at any time. But most assets do not have liquidity; from crypto to cash withdrawal is expensive, since the crypto-infrastructure is not yet developed.
See directly it is impossible for us to convert them into cash, for that, a cryptocurrency needs to get approvals from the government sectors. But we can easily convert them to other cryptocurrencies and we have to find the other sources in order to convert them to the fiat currency.
I dont see anything difficult to exchange cryptocurrencies for fiat. There are many legal schemes for this.