when i started trading forex at first i lost some cash (ouch, but normal, forex requires good experience), but i gained much more than i lost from Bitcoin, Litecoin and PPcoin rapid growth (generally i had my investement in btc/ltc/ppc multiplied by 15x on average in 6 months and i cashed out large portion of it to fiat). If you are patient it is a very good investment. BTC/USD should be at the new heights during next 5-9 months.
Anyone who understands economy, how the fiat currency works (unsustainable system of constantly increasing ratio debt:currency, that is coming to an end probably before 2020) and bitcoin structure also understands it is still a great investment. (i diversify to other cryptocurrencies) Will it withstand for a longer time? I dont know, but looking at economies it has pretty good chances. More important is that if you invest in it now and make a plan of cash outs at specified growth, you will make a lot of money on it.