A bubble is when the price of something is far higher than the fundamental value.
Bitcoin gives you ownership of nothing (a stock gives you ownership of tangible assets)
Bitcoin pays no dividend
Bitcoin gives you no right to future payments (bonds give you the right to payments)
Bitcoin gives you no patents or trademarks
Bitcoin gives you no legal rights
Given these facts, you Bitcoin fans need to prove that the fundamental value is different from zero (or close to zero) - otherwise it is a by definition a bubble
Have you ever purchased a bitcoin,if you did you know how you can have the asset in your own hands without the help of a third person,if you own one you have the legal rights to do anything with it ,about the dividends,have you heard about forex trade,does that pay dividends ,which bond pays you more than the market valuation,no one is forcing anyone here,if you want to trade and accept the new form be a part of it,if not just watch how people are having fun with it.