You are right. We should not depend our future on bitcoin as its price is volatile. We are not sure on how it will be priced one to two days or years from now. That is why I am just investing the money which I can lose. Those are my extra I guess. But would be hoping that its price would goes up to secure my future. 
Yes it is, and actually we cannot be sure that Bitcoin will last that much given the fact that it was stated to be limited nowadays and I guess we cannot expect this forum to adjust. We can look to this forum as an extra way to gain profit but depe ding onhis to live might not be a good idea since everything here is temporary , the price the dates and even this forum so better to work here and start up your own business to run.