#Bitcoin itself is the yield.
A key metric lately is the growing inflow of capital from larger players. Outflows are small, and with institutions and 401k access opening up, we’re seeing serious capital enter the space. That compresses volatility and adds strength to the network.
It’s not about needing more people, but it’s about capital deployment.
As long as the network remains decentralized and secure, nothing will stop this train. 
