I think there's a lot of opportunity to build in the Bitcoin gaming space.

Bitcoin for boomers.

Converting home equity to Bitcoin (diversification as a service)

Bitcoin security tokens.

Bitcoin DeFi on Liquid Network.

Decentralized exchange applications using the upcoming decentralized web stack that bitcoiners are building (synonym's slashtags, Tether's hole punch, Block's TBDEX, webs of trust)

Integrating with Fedimint.

Building Bitcoin-only & BItcoin adjacent exchanges & onramps that prioritize privacy & peer to peer.

Those are a few.