This should only be considered to having possibilities of happening and nothing close to being certain to happen or guarantee and even if everything is done perfectly well and accordingly it doesn't still mean that it would always yield profits in the future yet I will still say that there is nothing wrong trying to do everything being followed accordingly by staying disciplined and focused through buying with your discretionary income and not selling too soon, I agree with you about Bitcoin being more on the increasing side with the increasing adoption but don't still know what will happen in the future.
That is why it would be extremely wrong to go all in on your Bitcoin investment because the future is not guaranteed, it is true that their is a higher probability of Bitcoin rising up to $1M or more but due to the fact that we live in a world full of uncertainty, going all in on your investment is dangerous because you might contemplate suicide if you invested what you can not afford to lose, but if you invest only what you can afford to lose, if your investment doesn't go as planned in the future, you would not be that shaken financially, but take note that no investment is risk free, including Bitcoin, it's as risky as every other investment out there, but the risk attached to it can be easily reduced to the bearest minimum if you can hold it for an extended period of time.
bitcoin can not go down overnight to nothing just like that. before bitcoin will experience a serious DIP that is capable of causing an investor to go completely down to the zero point, a lot if not all other digital asset must have experienced similar fall or worse off fall than bitcoin.
one reason we can continue to comfortably buy bitcoin even at the time when it is getting bearish is that it also recovers after each of the bearish seasons and even though the future is uncertain and that we can not out rightly predict what tomorrow brings, we are at least certain that things will not just happen over night without an hint. for instance seeing that bitcoin is even attempting to break through the $120k, do you think that overnight, it is possible to see bitcoin going down without 24 hours or less than that period of time to the range of say $20k? the same way it always takes time before bitcoin gets bullish is the same way it will also take before bitcoin can get really bearish and such bare that gives you the impression that you can lose all the things you have invested might never happen not now or anytime soon.
going all in as an investor is not right but the reason why it is not the best idea to do so is not because bitcoin will DIP to nothing, it is rather because you are exposing your investment to factors like impromptu selling to sort out emergency since you are not prepared for such kind of possibility.