If you have Bitcoin i recommend that you hold it no matter what. It doesn't matter if you bought 1 year ago or when Bitcoin first appeared. Holding Bitcoin will make you profit either way.
As regards Altcoins, i recommend holding or trading the ones that are active, and ones that you see are showing good progress, like Ethereum, Ripple, Cardano or Stellar. Even coins like Tron and Monero have potential but you must do your due diligence.