Not necessarily. There are traders who are successful crypto traders and trade part-time. Success depends on your financial goals and wins, so there is no definite answer to it. Your trading method is also important here. If you're a long time trader, you require more hours.
Part-time or full-time it doesnt really matter at all because everything would really vary on how you do trade and success will depend on how you do handle up things even though the difference is truly that
noticeable and this is on where people do make out decisions whether they do go for full time or part time depending on their extra time and finances as well.
Being successful isnt something that you could really able to know on whats ahead but you could at least make out some steps which could give out some advantage.