If you invest in Bitcoin or you use Bitcoin for a payment tool, it means  you have contributed in Bitcoin. You don't need to have specific skills to contribute in Bitcoin, you can contribute with something that you have the ability.

I'm investing in Bitcoin and I'm trying to spread the awareness of Bitcoin in my area. There are some people who constantly ask about crypto and Bitcoin investment to me, I always share my knowledge about Bitcoin and crypto to them. I'm also trying to give them a proper understanding of crypto and Bitcoin. The are many people who misunderstand about crypto and Bitcoin, they must be given an explanation regarding the truth. So far, this is some efforts that I can do for Bitcoin.