Still options are so expensive in Etheropt exchange, I'm waiting for better pricing. And some expirations are so close, I like longer expirations which means I will have more time to make profits and apply proper hedging strategies (risk management) on my existing positions.
It is a hard to thing try and make a living out of cryptocurrencies only because that means that you will have to handle in allot of them to make enough money to be able to pay for everything that you need to pay.
For me it would not be possible that is why I use it as an secondary income.
The hardest thing is probably the lifestyle and then #2 would be actual skill to trade profitably.
You have to spend huge amount of time in front of screen, you think about trades while you are socializing/doing other things. It gets harder the older you get. Thats my thoughts.