I'm not presupposing no one will have interest in Bitcoins, I'm not presupposing this: "bitcoin will not be spend anyway", what I mean is "if no one spend Bitcoins". This means who has Bitcoins won't spend it, but who doesn't have Bitcoins could want to have it, to buy it. There is no sellers, but there are many people wanting to buy it, and those who wants to buy will increase their offers to buy Bitcoins until a seller think the offer is good enough
Your assumption simply doesn't make sense
Just because there is no viable economic reason for it to come to life in the first place. Hypothetically, the price could reach ridiculous values, for example, someone might be willing to buy a few satoshi for a few hundred dollars, just for the fun of it, but that's pretty much all there's to it. In real life, though, you can more often than not see the opposite situation, i.e. only sellers being present in the market who want to sell their useless and worthless shitcoins, and no buyers sticking around altogether
If right now, all BTC sellers hold their coins and stop selling it, what would happen? Would Bitcoin die and crypto-currency enthusiasts move to an alt-coin to pump it to main crypto-currency status?
Or the BTC price would increase as the demand would be 100% higher than supply?
Strictly speaking, in that very case you can't even talk about Bitcoin price any more
Really, what is Bitcoin price (or price of any asset, for that matter)? Basically, it is the price at which the last trade was executed, so if there are no more trades, you can't assume that the price will sky-rocket. If there are only buy orders at a price higher than that last price, it will lose any value as a reference point. Ultimately, buyers will lose interest toward Bitcoin en masse, and since they don't want their money sitting idly in the orders which are never to be filled, they will pour it into something else. The market will essentially die with a few orders left in the order-books across exchanges
I must say it's true, because a currency can be replaced by another without disadvantages. But if people really want Bitcoin I believe they would continue trying to buy it until a seller place a offer.
The reference would be the buyer price, each new buyer offer increasing in reference the last one. After some time, some crypto-currency enthusiasts would migrate to another coin, and the BTC sellers would start selling again for the pumped price.
That is something the chinese lobby could do. The big whales club. It's just a strategy the big holders could try to have profit, acting in group to rule a decentralized currency, a risk plan that could kill the currency.
If bitcoin fails it will not be easy to replace it with any other cryptocurrency. As of right now, crypto is bitcoin, there is no other way around this. If bitcoin fails, 80%+ of the market spent in crypto also falls. I don't think there will be a second crypto, bitcoin is our only chance, so we must make it succeed at all costs.
I must say that I think that you are right about that, if we do not succeed with the bitcoin it will be all over for all cryptocurrency's.
