The issue with this is that holding isn't always the best option. Holding is the best option only if you believe that after each peak, bitcoin will surpass that peak once more in the future. There will be a time where bitcoin ultimately stops going up, and that's pretty much inevitable. We just don't know when that will be.
That part of your post includes everything that's needed to be said about why holding has been the best option thus far, and still IS the best option in the forthcoming years due to the insane growth potential. I probably shouldn't have used the term
always, because this directly implies that the market will
always keep increasing, and that indeed can't be the case for ever. However, with what we have experienced in growth thus far, and with the potential growth that we can still gain, holding at this point remains the best and easiest way of getting that growth exposure.