Other than simple word of mouth, explaining blockchain, crypto and more specifically bitcoin then there is not much that I do. Nowadays most have heard of bitcoin so it's more of an explaining exercise, the potential benefits etc.
through proof of success can represent a complex and lengthy explanation, because some people want to see results rather than processes, explaining bitcoin is very difficult because most people are still very unfamiliar with something that is not real, so proof is indeed the best way.
Because making money from online investments is still taboo, people will avoid you if you talk about unfamiliar businesses like crypto or bitcoin, sadly they will categorize it as an MLM and ponzi business, but at least we have tried to help promote bitcoin..