Not all altcoins goes down when Bitcoin goes up. A lot of depends on altcoin by itself. Altcoin must be useful for people. It is necessary to create demand in altcoin that investors wanted to buy it.

There are ecological projects. Here is written how it is important to protect a nature and what have already been done for nature protection https://moss.earth/blog/.

I think that demand in ecological projects will be big because it is very important to protect a nature.