All current cryptocurrencies are not good to use including BTC and will disappear , these are the reasons and solutions

Can today's famous cryptocurrencies used to meet everyday needs, such shopping online, buying groceries, or even buying a cup of coffee.
?

Imagine how boring to stand in line at a supermarket waiting for the customer in front of you to confirm his BTC purchase for more than 10 minutes and everyone is hoping for the third confirmation to be completed.

How about going to buy a wedding ring with some ethereum and suddenly the salesman apologize saying he can't accept ETH because price went down more than %40 as he need more ETH for the ring.
Another obstacle is that these currencies are very difficult to conduct a feasibility study for any business relying on one of these currencies for budgeting as prices variance so quickly.

I would like to point out that all these currencies cannot be identified to what the owners of the wallets have in it and can not legally be inherited by the heirs of the portfolio holder.
In my opinion almost all currencies are not fully suitable for daily use, this is due to many reasons, the most important fluctuation of prices so significantly. Also because of the time to complete the transaction or the high costs of transaction, not to mention the ease of use and security.

So, what's the solution ?

In short, this idea is just the first spark, but it needs more to think about.
Gentlemen, we need something called the decentralized Dual block-chain System.
It is just like the old days, we need gold in order to print money not like today(for more understanding please watch the below video.

Thus we need a dual blockchain that can handle with two variables.
first one is just like gold and it could be mine by miners. the other one is the day to day usage and it can be produced through the first one with a stable price to USD. the first one will be controlling the produce amount of the second one in order to maintain the price stable. Moreover the first one mining reward goose to the miners and the second one when it is produce goose to the stakeholders of the second one.
It is a small idea and if you like it I hope you support it by voting for me and putting your comments and thoughts as I am through steemit block chain records. This idea is intellectual property and I have the right to legally claim anyone who does it without prior agreement.