You made a very cogent point here that all should consider keenly:
Thank you.
1. Do you Stablecoins backed by other assets is not different from altcoins and bitcoin in terms of volatilities?
Properly backed stable coins are not much different from
the assets used for backing them (no big relation to Bitcoin).
They are usually different from Bitcoin and altcoins. They are usually backed by fiat currencies where the supply is not finite, while Bitcoin supply is finite and rather small.
This means that the value of fiat currencies usually decreases over time (inflation) giving the impression the value of Bitcoin is rising.
What I said was that if only properly backed coins would be used to buy Bitcoin its volatility
could be smaller.
But the current high volatility is also caused by the fact Bitcoin (and altcoins too) is a young asset and its markets/exchanges are not properly regulated.
2. Why is the US dollar a fiat currency stable overtime? I believe one of the reasons is due to the backing of the gold standard.
US Dollar is far from being stable. What tricks you is the point of reference. Remember that ancient people thought that Earth sits and Sun is travelling around it.
US dollar is now about 20 times weaker than it was in 1800. See
on this website the Year/Dollar Value table on that page. Or search for other ones, this was just a search result, I don't know how accurate it is, but you'll get similar results.
3. Don't you feel that a crytocurrencies backed by fiat currency like USD will be more stable than dollars?
In theory an USD backed stable coin has always the value of 1$, so it can't be more or less stable than dollar.
In reality some small fluctuations happen, but I think that the reasons are fees, supply issues and maybe bigger problems. I tend to avoid USD related stable coins because of this. They don't bring me any benefit if I don't arbitrage.
Although, the market force is a powerful market trend force.
Always keep this in mind, whether you talk about inflation, volatility, halving or speculation.