STX entry 1.8 to 2.06 through 4.Stacks ($STX) is a layer 2 (or as described by Stacks as a Layer 1.5) smart contract protocol that lives on the Bitcoin blockchain. Via Stacks DeFI and other utility/protocols including City Coins (currently being minted by New York City and Miami and soon Austin and others), while other DeFi platforms built for Bitcoin live on other layer 1's (i.e. Badger on Ethereum), a smart contract protocol on top of the most secure blockchain may or should not only assist in avoiding a "flippenning" but is critical at a time where multi/cross/para chains are the current solutions to avoid bouncing protocol to protocol.
Additionally Stacks was both the first cryptocurrency to be acknowledged by the SEC as a security and also to be no longer recognized as a security by the SEC after successful adoptions. DYOR, Grayscale and partners have significant involvement in Stacks and was instrumental in the SEC approvals. This is pure gut but my gut says Grayscale will be the first BTC ETF approved by the SEC due to familiarity, etc.
Fractals show a similar pattern having already taken place, expect a full push or a pullback and then push to and through $4. Naturally as tied to Bitcoin, BTC volatility could slow or speed up the growth of STX, but smart contracts on the Bitcoin blockchain is powerful and not discussed nearly as much as one would expect.
The stacking opportunities and ecosystem being built around Stacks i.e. City Coins (read NY and Miami Mayoral comments on plans) make this a long term hold for those who want, as blockchain continues to proliferate real world applications beyond just crypto.