Yes holding is waste so long times even a few years, alot of newbies investor was decide to hold crypto in the beginning of 2018 without any risk management, so they getting loss much money. So trading or holding should be with risk management.
Holding isnt a waste of time because when you hold , you didnt do anything . you can just leave your coins inside your wallet and continue your life outside the crypto scene . trading should be consider a waste of time because trading is an active activity . you dont need any risk management when you hold because hodling is not risky as trading and as long as you chose the best coins .
I see HODLing as one of the easiest way to make money in the market. Just imagine you're not doing anything and just continue to buy in dips and wait for the price to go to another bullrun. The only downside, you need to be mentally resilient and tough not to sell. And even if you wanted to sell, you need to have a good timing to dump them when it's at the highest price.