Before, it was for the tech, and to be honest, it was a golden era when people mostly invested in Bitcoin because of its decentralization, and truly in it for the tech. But today, can't deny that most are just interested in the profits, and it's not going to change. Time has changed but those people that are truly concerned about bitcoin's decentralization was still there. Fighting in the shadows and doing it silently. And maybe the others don't care anymore when it's only about the value of it which everyone is looking up to.
People can try Bitcoin blockchain with curiosity about its technology but with investment reason, I believe that many Bitcoin investors don't mind about its technology. There are people who look at fundamentals that include many things, not only technology, before investing their money but not all investors do like this.
Some investors simply invest because they see Bitcoin grows up in price too exponentially and want to join the party, that's it. Perhaps later they will see something great in technology but it is not first reason attracts them to Bitcoin. Intelligent investors surely care about technology as it relates to security and safety of their bitcoin portfolios together with other fundamental factors.