So I see you are another hopeless case of calling Bitcoin Core/Blockstream centralized and whatnot. Well, I wish you luck with your altcoin, meanwhile the best minds in the game are working hard in keeping the core of Bitcoin decentralized and scaling it through additional layers as any sane person intending to scale a protocol to worldwide usage would do.
In a couple of months it will be clear that anyone that didn't move their altcoins yet to Bitcoin will be up for a harsh awakening.
Who knows? Personally I hope Bitcoin has a strong position for a long time to come but if you think it's destined to be the only coin or is invulnerable to centralisation then it's time to stop drinking the coolaid, even Ripple is going to be around for a while and Etherium is likely to get very widespread adoption via the tech giants unless something better comes along soon. There's going to be more and more alts from here on out, sure, plenty of shitcoins but there's an almost limitless number of niches for them to fill. Dash is purely aiming to fill the niche of digital cash, maybe Bitcoin or some bank created contraption can do that job better, only time will tell on that score but things are looking very good for Dash at present in targeting that specific role.