I guess we have to ask the question why we shouldn't believ in cryptocurrency? The vast majority of people believe that it's a bubble like there was a dotcom crisis in the beginning of 21st century. However, I guess cryptocurrency is much harder and it has millions of algorythms. I believe in crypto abd think that  it cna reach heights within couple of years, because everything points at it. Of course, everybody decides by himself why he/she believes in cryptocurrency, I do it just because I have read plenty of information about cryptos and how do they work. So, there are no reason not to believe in it.

Bitcoin is just one of the cryptocurrency options.
You can also consider other options.

In case you're a total rookie in trading I personally don't advice you to start off from cryptocurrency trading, because there is a huge risk that you will lose all your accumulations, which is a direct consequence of lack of knowledge and skill. In my opinion, you'd better get acquainted with forex trading. Of course, all the trading types are somehow can be considered as difficult for studying, nevertheless it's only because you're just starting. Everything you should so is to dedicate uncertain amount of time to learning and practicing. When you will have results at forex, you can try your power at cryptocurrencies.

As far as I can tell there are plenty of ways to make money online. Speaking about business, you should have a desire to start your own business online. Then you have to think of the conception of your business, you know. Maybe you want to sell clothes, various things, goods and services. After you deterine the conception you should start to find a propriate distributor of your services/goods. There are lots of websites where you can buy things and then sell it at a markup. Actually, it's the most spread way of online business. Then you should crete a website and connect banks which will help you to make transactions.

This is only becoming popular.
I think that with time other payment systems will also become faster and more efficient. Everything takes time...

Oh, there are so many good offers now - I don't even know what I can choose.

You should certainly never take a loan and then use the money to invest in cryptocurency if you are in no way ready or sure that you can handle it.  There is never any guarantee that you will get profit. You may lose all the money and have to struggle paying for the loan.

I think we should always do a thorough research before you begin spreading what you are not sure of. The migrations of the miners from China begun long time ago before the break out of the corona virus. It is very true that the virus has brought a lot of fear that has negatively affected the economy globally.