Should I believe in Bitcoin ?
I have 10k $ and maybe going to buy , but I doubt the further development of Bitcoin and I'm afraid to lose money! Can you convince me or dissuaded from buying?
In my opinion if you are afraid to invest all your money into Bitcoin better then half of the total invested your money in Bitcoin. And the other half you can use to invest in other businesses.
No one should invest all their money into one sector (in this case being bitcoin). That is too risky to do in case prices fall all of a sudden and you can easily lose a lot of money. Its better to diversify the investments.
You should buy coins at lower prices, so wait for prices to fall near a target price.
Again any real life business, gold, real estate are better investments than online ones. But you have make proper decisions yourself otherwise you will never learn about who to invest properly.