Obviously, Bitcoin is deflationary by design so it will kind of increase in value over time. However, expecting the volatility to continue to happen in the same extremes probably isn't a good way of looking at it. Since, it's just not sustainable.
As the block rewards become less, and less we should see a reduced amount of volatility, and therefore speculative investors will likely become less interested, as the big swings disappear.
But, I don't think Holder thinks about short-term Votality. I'm sure those who do scalping trades are taking advantage of that. Holder's expectation is that the value of Bitcoin always rises even though it will eventually fall indeed due to the saturated cycle. The theory of supply and deman laws is the hope of holders.
Even though the current world economy is very different and I don't know what would happen if a global Recession happened. I think a big effect on the price of Crypto and a big test for the Holders. But so far I hope this history will become a belief and continue to repeat itself.