I think first of all, I would take half of it and put it away until next cycle. Expect that half to at least double. (More than triple would just bring us to previous ATHs.)

I really see promise in Lightning splices. Dusty is working on it. Batching spliceouts creates a coinjoin-like collaborative transaction cheaper than a normal on-chain payment. When a privacy-preserving payment is cheaper than a normal on-chain payment, it can become the standard way to do an onchain payment.

Fedimint is another project that shows promise. As it stands, theses no way to tell if there is too much e-cash being minted. If a cryptographic proof could prove the right amount is being minted, that would be a game changer.

Rene Pickhardt is working on a way for Lightning Payments to split up in to tiny increments which take different routes to get to their destination. At the moment, wallets optimize for maximum reliability by using the fewest hops possible. This causes the centralizing of the network by most payments taking wide channels belonging to exchanges and custodial wallets. 'Pickhardt Payments' can make even larger payments to be routed over less-traveled, less-funded and probably less-surveiled pleb channels.

The Salvadorian 'Bitcoin Beach' model is also a great way of bootstrapping grassroots adoption and is being implemented other places.

Opensats, maintained by matt Odell is a collection of opensource Bitcoin programmers that one can donate to and the fund splits up. It's also a tax deductible donation.

Anyway, just some ideas.
P.S. This is hypothetical, I don't have 10 bitcoins.