I don't really think that way though because I know of some few individuals that were traders, but due to constant losses they finally realized that investment in bitcoin is the best, though they till venture into the market, but they aren't as obsessed as they were when focusing on trading alone.
Additionally , they now do it like something they wish to try their luck, anytime they wish to, even though their main focus is in Bitcoin investment, so I believe that both of them can be done without troubles as long as he prioritize Bitcoin investment over trading.
Doing both trading and investing in bitcoin ain’t bad at all Aslong you know what you are doing as an investor and a trader too. There are professional traders at there that are big investors they actually use their trading profits to keep building that investment (bitcoin ) .
But if you are someone that is finding hard to understand trading while investing I will advice you to stop and focus on your bitcoin investment alone , but if you choose to continue both in such case I will advice you to stop putting money on trading and focus on learning more while investing in bitcoin , so that you won’t keep on wasting your resources.
Doing trading and investing together may not be bad like you said if the investor is able to separate his trading only from.the investment and holding money but it's way too complex than theories because emotions are involved. Secondly, this section of the forum is dedicated to discussion holding bitcoin, hence it would have been better we focus on buying and holding for long term and not trading. Thise whn wishes to discuss trading can visit the appropriate section dedicated for such discussion to talk about that.
Personally, I will not encourage newbies or young investor to go into trading bitcoin else he can trade away his bitcoin without even knowing what he doing. Newbies should focus in accumulating and holding bitcoin which is a surer way of amassing wealth for the future.