Op seems like traditional stock investor that is why he/she go for low percentage of profits in crypto currency as well but something looks like guaranteed.
But if you ask me I wouldn't do this for only 17% of return per annum since we can make that profits if we do the trading with volatile coins in couple of days but risky though.
Yes. That's why a lot of people invest cryptocurrencies. I think the stable coins arbitrage can only be a part of the portfolio.