There is no current alternative to replace Bitcoin and that is because Bitcoin hasn't failed yet. There are several hundred coins lined up to try take that position though if Bitcoin ever does fail. The crypto economy can survive without Bitcoin but I think a lot of confidence would be lost at that time, although a recovery to me would seem inevitable.
No reason for now that bitcoin will die. Its still staying exist in the top. This kind of op can make another FUD to new comers i think so we have to avoid this kind of post if can.
If not then do your own wish. But the effect would make us stay without profit because maybe bitcoin price stay in the bottom