Yea consistency is important but not just especially for newbie alone because there are investors who started their investment long time ago but if you check in their wallet it will be as if they started new so anyone who is investing in Bitcoin so long as you haven't reach to a set target you need to be consistent though sometimes it can be somehow at times, for me I don't have a set target but when I get to that point I will know that yes I have gotten to a good height and setting a target can be very interesting if you have a good discretionary and a well paying job.
One of the most important preparatory actions of a bitcoin investor is having an accumulation target aside of course accumulation amounts as well as a hodling period, and your accumulation target it serves as your finishing line and is main focus to reach faster in your journey. without it you might be wacky in your accumulation since you don't have a target. I recommend having a target even in your little income no matter how small and tend to readjust it if you reach it before your holding period expires and if I may ask, how would you even know you've got to the point you are insinuating without a target. Having an accumulation target is very important to sustain our drive and continuity potential in our accumulation journey.
Investment exists fore a reason - to reap the rewards eventually.
So getting 10-20% out and continuing with the same reliable strat is totally viable.
Because if you only accumulate - you won't have reliazed PNL in the end.
It depends on when you plan doing this, If you do it at a point of over accumulation, there is surely no problem, although I see it as too much to shave off at once, but at the level of your ongoing accumulation journey, and when you might have not accumulated enough, then it becomes a problem for you to always want to prey on your portfolio before maturity, and you may likely end up increasing the percentage over time and liquidating your portfolio and having nothing much, if at all to show from your periods of assumed accumulation.
You need to discipline yourself to only accumulate persistently, consistently, aggressively and committedly over your holding period, thinking of preying on your investment before maturity might not end well and selling off too soon makes you a trader.