The only strategy that worked for me was to hold btc and eth because all other coins gave me loss when i analysed my purchase price in terms of btc or eth, most of the alts are only good if you are looking for usd based profits.
Hodl is good but I prefer to invest or staking in a new project or existing one so I can earn double because by staking and investing i can increase my token holding that way I can get double profit and it's much more safer than just holding because I can increase my token number while at the same time waiting for the price to go up.
You can compare how much you got from holding your bitcoin compared with investing in the new project that launched on polkastarter.