If you are rich enough to invest in cryptocurrencies with only a small part of your personal assets, price fluctuations will not have much impact. Long-term holding is a very difficult thing in the market, and price fluctuations can easily affect the decision. Holding is a strategy. Long-term holding will be very profitable if the market can be analyzed correctly.
not only rich man should do this , in our money management rules we must set less than 2% for each trades and never overtrade and greedy to generate profits instantly. Long term investment mean we have to wait product developtment running for several months or even years , and during this periode price will fluctuate . Did we ready to face it or not.