The other thing to take into account is that apparently only a few people own a vast majority of bitcoins and these people are not eager to sell. They are basic

The other thing to take into account is that apparently only a few people own a vast majority of bitcoins and these people are not eager to sell. They are basically doing what's called cornering the market. The price rise is mostly due to scarcity in sellers rather than craze in demand. The market stability depends on these big owners. And they're not very likely to panic-sell. If one of them wants to get out, they will probably sell slowly over many months.