Maybe it's just a start, day by day, he could be more mature about the market, and I'll constantly give him the market updates.
You has enough knowledge so able too tell what you experience has been, and what you teach becomes more easily accepted because your uncle already understands about investing in stock that actually works almost the same as crypto, it will be difficult to convined if he is a layman when it comes to investing, moreover, crypto is more volatile and it will make people who are in investing in crypto will be very worried about its declining assets.
He will become more mature if he continues to learn about the crypto market.
When explaining to someone about cryptocurrency then you should really be having the knowledge about it so that explaining wouldnt really be that difficult but of course you should stick with the basics
on which newbies could easily to understand but on someone that does have some market experience then it would really make the thing more easier since they could easily able to catch up since
they are already a trader on where there might be some differences on which you should mainly mentioned and it did really convince him out which is great.