Maybe, I'm just missing your point, however; What's your problems with the current security of Bitcoin? I mean, it isn't inherently insecure, otherwise it wouldn't be worth anything. So, what specifically do you not like about it, or what security aspects do you want to improve?
Bitcoin is also almost infinitely scalable. Probably more so than our current mass preferred fiat system. So, there's that. Plus, it's already decentralised more than our fiat system, which already makes it the better option in almost all metrics. Cash isn't as secure as Bitcoin, and I'd argue that electronic money, i.e those that are stored on banking systems also aren't as secure.
So, I'm struggling to really see current problems, but would like to hear them.
A cryptocurrency can't be decentralized, scalable and secure all at the same time.
What exactly are you referring too here. Bitcoin is more scalable in certain areas, but without knowing exactly what limitations you're talking about, I can't really accurately discuss the scalability issues. Are you talking about the storage issue that we might run into etc?
I'm not saying Bitcoin is not secure or decentralized, if I came across that way in the post, it wasn't the intention. I'm saying Bitcoin is not even close to scalable. Transactions take way too long, and are too expensive for a globally adopted currency. It can't scale in real world adoption, unless you sacrifice security, or decentralization by using an alternate network, like El Salvador has attempted.