Don't think it will because I don't think altcoins would have made it this far a few years later if Bitcoin was always going to kill them. I think alts are here to stay but their role may get minimized in the future and or some alts may day out. This does not mean alts will die and especially if an alt has an actual use case in life it has no reason to die. Dogecoin I could see dying but a coin that makes crypto spendable like TenX probably not. I could see weird obscure tokens and coins dying but what about the one that is involved with identity verification? If it has use case it probably will survive if it does not then one day or another it will likely die.