You should have done this earlier or into those times that Bitcoins price isnt moving that much or not really that high in value or not those high prices already. The wrong thing for most people is that on the time that they would be seeing those green candles then this is the moment that they would really be considering that all in buy and not into those times when the market is still red. Well, this is really that a very very common trader or investor behavior specially to those who do lack knowledge and experience on which sooner or later they would really be able to realize that they should have done the opposite.

If you are someone whose really that go for long term then any price entry wouldnt really be that much of an issue since you would really be that holding it for long term.
Any price movements wont really be that much a problem since you wont really be selling anytime soon.