The general consensus is that people who try to time markets get rekt. It's the same reason why you don't buy that course by the expert stock market traders who try to sell you their 'system'.

As a general rule it's ok to 'trim' your position if you have an extremely value use case for those funds in fiat. However that's not what you are saying. You purport to know the future and seem assured that 80k will present itself again. An equally probable scenario is that Bitcoin peaks locally at 200k but only reverts back to 140k and never retests 80k.

Remember Bitcoin is a protocol not a stock. It is a step change functionality improvement in base money on a global scale. I would put it to you that you don't yet fully comprehend what it is that you own.

Your best strategy is to focus on improving your capacity to harvest more fiat to then sweep into BTC for long term savings rather than to 'trade' your way into a bigger stack.

Just my two cents. 👍🏻