Hi, I'm a fan of Bitcoin but after getting to know more and more altcoins I begin to worry for BTC's competitiveness since many of these altcoins were built to better address BTC's shortcomings and then some.

So I was wondering if it's possible for bitcoin to quickly adapt or even completely replace its underlying technology (i.e. Blockchain) with something like the one used by IOTA for example or any other system (assuming that Tangle or any other better system/technology proved to be successful and well received by the masses). Or is Bitcoin's adaptability and evolution pathway really narrow that it risks being outclassed by newer and better altcoins?

Forgive me if these questions sounds really newbish because I am one and can only understand blockchain and cryptocoin technologies on a colloquial sense.

Appreciate your views and technical insights on the Bitcoin's adaptability.

Thanks