If you can buy Bitcoin and save it this is also a type of investment because the value will grow a lot more then what regular saving has provided in terms of wealth gain on a yearly basis.

I think it all depends on the person himself like what he has in his mind. If he actually wants to keep his money safe and he don’t want to increase the amount of money he is having, then saving is a very good option. On the other hand, investing is far more profitable thing to do as compared to that of saving and it can actually help you in increasing the amount of money you are having.

If any one can save some money after all monthly expenditure, it is Best. And if you know where to invest, that is better. Invest in your favourite project. If your project become a success, you will get profit. By saving money you will initiate a business and by proper investment you can multiply your earning to several folds. So your question is incomplete or it needs multiple answers. First chose your project after proper search and choose multiple projects and do not invest all of your capital in a single project. And always remember that investing is always risky. You may kill all of your investment

The problem with investing in such programs is that you are betting the economy of the world is going to keep functioning for at least 20 to 30 more years, and there is a collapse of the economic model every 40 to 50 years, so you may be one of the unlucky ones to lose everything if you do that.

Is it better to save money in bank or invest it online, in real estate or maybe gold?

Do both. Invest some of your money in altcoins and try to make more and save the rest but not in fiat but Bitcoin. That way you earn double