I think very few people give up a full time job to handle and survive from crypto transactions. To become a trader it is very important to have some money to survive for a period of time until you start making a profit. Trading is very complex and requires many years of experience to process all the information that will make you a good trader.
Only those who can afford to lose their job and depend on their tradings income can become a professional trader but if you don’t have time to analyze much, then its ok to become a long trader. We are talking about professional trader and when we say professional, you should know everything about cryptocurrency and about trading which I also believe takes time before you become a professional trader and it requires hard work.