I think Bitcoin is the most valuable coin right now. It is the most expensive cryptocurrency today.
Not every budget can invest. However, the more it earns when investing in high amounts, the more it can make you hit the ground. This crypto, which is available on every exchange, can be converted into other subcoins.
There are also bitcoin mining sites. You can mine bitcoin on these mining sites, but I do not think they have confidence.
More reliable and more online than a bank.