That’s basically equivalent to betting on options (but wrapped up in a way that looks simple). Always remember XIV.
I'd say DCAing into TQQQ is not equivalent to "betting on options" in terms of risk. Obviously "options" is a general term and you can in fact construct options positions to be more or less the same as holding the underlying stock, but when you say "betting" I think it implies a high chance of unrecoverable loss that typically comes from expiring options.
I’ve been planning on doing exactly this with TQQQ and SOXL myself once they drop another ~40-50%. Though it should be noted I only have a small amount of capital to use compared to the OP (around 1% of the OP).
With this thesis in mind, it's clear that (T)QQQ and semiconductor companies are gonna be huge winners in this new augmented intelligence era. One just needs the conviction to hold thru the emotional rollercoaster that leveraged ETFs are.