Who says dollar would die, it was created before bitcoin and bitcoin relies primarily on fiat. If dollar will gone in circulation then probably bitcoin will be the first to suffer a crisis, we do not to compare both as we know dollar is more superior.
Going back, if the price will not reach 50k the OP will not die then he needs to be immortal.
One of the first Bitcoin adopters (I don't remember his name though) who was lucky enough to mine heaps of bitcoins when Bitcoin was not worth a dime died a few years ago from some incurable decease, and his early mined bitcoins allowed him to pay for his body being frozen with the hope that somewhere in the distant future he will be successfully resuscitated and his health fully restored by the future medicine. In this way, if the OP has enough Bitcoins, he may not actually die completely even if it takes a few hundred years till we get there...
The lesson to take home is that if you want to be immortal keep your bitcoins tight