It is better for a trader to just quit trading and fully focus on Bitcoin investment if he or she really interested in bitcoin investment. That is the only way to be successful in Bitcoin investment. Trying to trade while also investing in Bitcoin will be very hard because trading has a short-term aim of making profits, whereas Bitcoin investment is a long-term journey some attention will be diverted and one side may jet more focus than one which i believe most people will focus more on trading as it short term result and that will seriously affect someon bitcoin investment.
Trading has no guarantee, and it is a very hard way of making profits. It is very possible for someone who loses all their funds in trading to tamper with their Bitcoin investment, thinking they can recover their losses through trading. From there, it is probable that the person will lose all the Bitcoin they have been accumulating.In fact, doing both trading and investing will not allow someone to focus on buying Bitcoin consistently over time.
I disagree with you when you trading has no guarantee, because even bitcoin investment has no guarantee too, but it is more profitable and less risky than trading, trading is Very risky and it's not really that profitable compared to one long term holding.
And secondly if anyone must trade he or she should trade shitcoins and not bitcoin, because bitcoin it good for long term investment, it is a store of value with potential returns so accumulate bitcoin and hold for long term.