The question should be “Shall I gamble what I can afford to lose on Bitcoin.” To that question I’d say “Why not?” If you hold for a reasonable target rice and then sell when it hits your target, the odds are you will do OK. I would certainly not hold “forever.” I don’t think Bitcoin or most of the digital currencies supported by block-chain technology are Ponzi Schemes. But I do advise you to KNOW WHAT YOU ARE DOING! Always “Investigate before you invest.” If you must invest in it, remember the golden rule of investing - Never invest more than what you’re willing to lose. If you absolutely must, no more than 10% of your portfolio must be invested in risky assets.