To answer your question, you can sell the altcoin you have hold for long time anytime from now and invest in the primary coins which the whales and institution focus in since you are not selling it at lost price but if the price of the altcoin is yet to gove you profit you can still hold or sell if the price is not much to cut lost cause some altcoin won't benefit from this bullish market
Now cryptocurrency market raise and it is more simple to earn money. It is possible to earn money on price growing. But it is necessary to check everything before investment.
There are a lot of scams.
Project must be useful to create demand in the tokens.
There are ecological projects. https://moss.earth/blog/ - here is written how it is important to protect a nature.
Now I think a lot of people understands how it is important to protect a nature from CO2 pollution to fight with global warming.