It is not easy to successfully trade cryptocurrencies while working full time, working while not having time to focus on proper trading and analysis, time will be allocated in a bad way. I prefer to invest for a long time, without spending too much time analyzing the market, investing in Bitcoin and waiting for the right time to sell it to make a profit. Work and long-term investing are easier for me at the same time.
Without a doubt it is hard as this is the equivalent of having two different jobs at the same time, and anyone that has ever done that knows how difficult it can be to perform adequately at both, however it is possible to do both if you are a really good trader, but since many people overestimate their skills then it is preferable that for people that have very intense jobs they become long term traders instead, as not only it is less time consuming but it is also easier to get positive results as long as you can wait for the market to move favorably.