Its great that Bitcoin can evolve and adapt then and remain decentralized!

So my question is why are people bothering to buy alt coins that currently are more energy efficient and faster transactions if Bitcoin will eventually implement these ideas and remain the true currency?

Coins like ZCOIN with their minting , and POS coins that dont rely on mining. If bitcoin will eventually implement the best ideas why are people buying? Does their value go up if bitcoin integrates their tech?