If you are lucky enough to buy at the bottom, that is surely going to be a worthwhile profit in the long run, but it is surely difficult to predict it, In my opinion, we are going to a slow movement in the market, we might not drop anymore to lower than 90k$ in the coming months, the thing is it might reach the top like 150k$ then drop to something like 80k$ that just means that its already bear season which is something that you dont want to happen since it would take a long time again to recover the price, I mean if you are aiming for long term I guess it doesnt matter.
I guess it is better just to DCA all the way, and diversify on other altcoins if possible, At least have some liquidity so that if a huge drop happened you could easily put some of your money on it easily, also in case it doesnt happens you also bought some using DCA, minimize your risk and could easily manage your entry point and exit point in case you want to take profit or buy.