It depends on so many things that I doubt you'll get an answer here, I don't know this website but no matter your status, you owe taxes on any income, including capital gains/dividends.
If I'm not mistaken, you can easily invest money in crypto from any site and from anywhere in the world. But this doesn't negate that you must also pay taxes on crypto. In general, I believe that crypto is the future, I recommend everyone to invest in it. When I first started to understand this, it wasn't easy. I remember that I found the site cryptoinformator and only in this way I begin to understand what was happening roughly. A huge variety of sites, videos, and traders will help you figure it out. So I recommend everyone to start understanding crypto
defi market making is a form of price arbitrage where a market maker buys or sells an asset at a desired price. The biggest challenge for a market maker is funding the risk. If the spread is narrow, a market maker can earn healthy profits. However, if the spread is wide, the market maker may not be able to make money.