I think you should stop using the word "invest", and state that it is speculation. Investing in crypto is the purchase of domain names and site building, or the starting of crypto projects. Just buying coins is speculation.
So if I follow your logic then I can say that people that are buying stocks in order to hold it for several years are not investors but speculators. Which imho is not correct.
Under speculations, people usually understand gaining profit from price fluctuations on a smaller period while investing is gaining profits on longer terms. So hodling BTC can be called investing and if you are going to sell your BTC stock in a few days (or within a day) after purchase that will be speculations.