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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.
Im not saying im a wizard with special powers that can see the future, im just looking at the fundamentals and at the simple facts we have today:
1) The best in the business is working on Bitcoin, and not other coins
2) Things are looking bright for Bitcoin, it's proving it can scale
3) No other coins are anywhere near Bitcoin, no other coin has lived as long as Bitcoin, no other coin has proved to scale as much as Bitcoin
Ripple is crap and ETH's blockchain is already insanely huge, they are not real competition to take Bitcoin's place. It just has not real competition at all, it's a fact.
Can your washing machine order up washing powder from your local supplier using your Bitcoin identity to charge it to your account? It can, it takes a bit of clunkyness but it's easily possible. The thing is, there will be an almost infinite number of examples like that and, as you've mentioned with Eth, trying to do that via a single system causes a ridiculous amount of bloat and at the end of the day you've got to ask yourself, do you want that from Bitcoin?
That's why niches, Bitcoin and the Lightning network might well put Dash and InstantX in second place as digital cash and if it does then my hat is off, fair play and Dash will have to find its self another niche but more likely they'll comfortably co-exist in parallel. We'll have to wait and see how that pans out but Dashes governance model is giving it a huge advantage in adaptability and it would have a very good chance of carving out a niche elsewhere. Governance is something Bitcoin really needs to catch up on fast, innovations are going to be coming thick and fast from all angles and it'll become a much more competitive environment before there's any sign of that settling down.