It definitely takes some nuts to hope in at this point.
A bit, but not if you only put in the fiat you can afford to lose. If the price does tank, it's a good excuse to buy more
BTC. If enough people think similar thoughts, this parabolic rise probably isn't a bubble due to the demand support underlying it, i.e. even if we do enter a bear market soon, the peak-to-trough decline might be no more than ~30%.