There is no way Estcoin could destroy BITCOIN and ETHERUM, there is still too many people who vale Privacy and absolute control over their funds. Like MONERO what is 99% coin for Private trading asset and DASh what is about 40% about privacy. Then there is 90% trader who value Privacy or Controll over assets. and about 10% who vale open market and fast money movement. But Estcoin will be centralised and not private then most people dont even touch this coin. Estcoin will be only for partiots, progress fanatics and thouse who wish to make Profit with next 2 or 3 decades or get control over some govermental assets. Estcoin with that consept will not be even threath to BITCOIN and ETHERUM couse BITCOIN dayini volume is more than 1/8 Estonia income. If estonia will consider Estcoin as national currency or asset what is covered with Real value like gold and uses some % of profits to buy more real value then it would be some change in longterm