Areas of interest:
1) Non-USD stablecoins – On-chain forex trading is the ultimate goal, but liquidity is a bottleneck for non-USD stablecoins. Most teams here are too focused on cryptocurrencies, and I'd like to see someone take a regulated route like Circle/Tether.
2) Stocks/RWA perpetual contracts – Perpetual contracts are superior to options and futures in almost every respect. Ultimately, they will become the most traded derivatives.