To me it seems like there have been talks about BTC becoming scalable for many years now. BTC is decentralized and secure no doubt, but if we don't solve scalability, how can this ever work out? And if BTC doesn't solve the trifecta, perhaps an altcoin will; before bitcoin does.
You are contracting yourself. You said,
BTC is decentralized and secure no doubt, but if we don't solve scalability, how can this ever work out?
This your question is even rhetorical question because you have already answered the question by saying that btc is decentralized, and if btc is decentralized how can we solve the scalable nature of bitcoin? I dont think this can be solve. BTC is not own my individual so it will be hard to solve it.
I'm not sure what's rhetorical about it. I said BTC is decentralized and secure, but not scalable. Therefor it's not possible for BTC to 'work out' meaning living up to its goals, becoming a global adopted currency. 'how can this ever work out' asking, how can BTC ever become a global adopted currency without having the trifecta (decentralization, security and scalability). If you lack any of these 3, you cannot become the advertised global adopted cryptocurrency. There isn't a single cryptocurrency till date that has all 3, every single one has sacrificed one of the three. Examples:
XRP: Scalable, secure. Not decentralized.
BTC: Secure, decentralized. Not scalable.
BCH: Decentralized, scalable. Not secure.