At what point is it no longer luck

Hey monkeys, I’m a “day trader”, and have averaged a ~70% return annually for a little over 5 years now. I still have a job (treasury for a regional insurance company) and do the trading (mix of long term L/S, a little options trading, and some shorter term investments) on the side. Would retiring and focusing on trading be a viable path?

My biggest concern is that my investments have been luck, that we’re having a strong bull market, or that I’ll no longer be able to make good investments and screw myself over. Could I try pitching myself to a hedge fund as a trader and show them my trading history? I’ve been feeling increasingly anxious that I make a wrong investment and lose everything, and I’d really appreciate the advice of more knowledgeable people in the finance industry.