Successful currencies meet three criteria:

(1) they are in widespread use as medium of exchange
(2) they serve as unit of account
(3) they are a stable store of value.

Most sovereign currencies fully meet all three criteria.

What about Bitcoin?

Bitcoin is the leading coin of the market. What you think about the future of bitcoin and others coin?

Bitcoins have made people head spin for 8 years now and become unbelievable since December 2017, when the value of 1 bitcoin rose up to 20 000 USD! But how this phenomenon appeared, what are the causes of this craziness… Found out in this article
https://blog.bitspark.io/why-is-bitcoin-making-the-world-go-crazy/

I noticed this phenomenon. Often someone buys up all the proposed tokens with a small amount of trading (for example, look at SMT on hitbtc this night), and after a few days these tokens go up in price very much. Is it worth buying such a token?

Almost every country has unemployment problems. There are many young boys who are working unemployed. But the days of settling their turn are over. Now, if you wish, you can earn a lot of money sitting in the house. Bitcoin can earn their unemployment by earning. It can be possible to improve the country by improving their lives by earning bitcoin. That is why Bitcoin among all Habetahale to spread the knowledge of the second day will increase the demand for Bitcoin.