Call it whatever you like, but you are misleading others and maybe even misleading yourself if you think that getting in and out in a few years is actually investing rather than trading.
There may be some exceptions to the idea because for age reasons or for health reasons a guy might not be able to be sure that he has at least 4 years to invest into bitcoin, and in those cases, he might not be in a position to invest into bitcoin if he does not have at least 4 years, and he would be gambling or trying to play a price wave that might not end up working out for him
That's right play with the market or price wave , is more of a trader thing not investors . And it is normally use for shitcoins which may not go well for you ( speaking with experience though). When I was try to play with the market wave back then usually endup with losses despite making little profit, but the losses still kept overwhelming. That's why I don't encourage newbies to trade , especially without any proper knowledge or skills .
Sometimes I will see some folks saying that there's nothing wrong checking on market trend regularly as an bitcoin Investor, which is not right if you are fully ready to go into Bitcoin for long-term you have to do it right by following the right procedures , so that you won't endup ruin what you have built in your Bitcoin investment.