The Thread you found about bitcoin is right. The fact is everything about bitcoin works out. Its just like a magic. Although, there are always different kinds on obstacles on the way. But it will later work out.
BTC is a currency, and i don't know the 'obstacles' you are talking about, but you can spend it at anytime, you just need someone who wants to buy, or a merchant that wants to accept it as payment for what you bought. The talk of BTC works like magic feels like a statement that one can get rich quick if they buy BTC, i'm sorry but that is not correct, while the BTC network works anytime for spending, if you are speculating with its price you have to wait for the long period, it does't rise like magic.