I don't mind him being involved in BTC trading. Of course, it's profit-oriented, but if there are more people like this, their marginal utility, so to speak, decreases. If there's just Elon Musk, his impact is very high. But if there are also others like Soros, if one of them goes bullish or bearish, it'll affect the market less. Also, I sympathize with Soros a bit because while he's very rich, he tries to help out other people by donating lots of money to good causes, so I think it's good for BTC reputation to have such names backing it up. According to
Wikipedia,
He has also donated 64% of his original fortune, making him the most generous giver (when measured as a percentage of net worth), and distributed more than $15 billion through his Open Society Foundations (an international grantmaking network that supports advancing justice, education, public health and independent media).