[...] you can sell some portion but do not sell all your bitcoin at once, instead set the target at a higher point, probably at $100k during the bull run market or at least until Q4 2020 that the value might hit the peak.
This was precisely what my OP said. Set exit points such as 35, 36, 37, 38, 39, 40, and sell some BTCs to take profit. You can buy cheaper when the corrections occur or just convert to FIAT and cash out. Corrections will happen. Even if you think it's gonna hit 100K, it will correct a couple of times until your target. It's not about selling all your coins, it's about programming little sells that will most likely let you get back in cheaper.