Not sure about future bitcoin price but I think it will stay for quite long time compared to other alt coins because its user base is large compared to other coins.
comparing bitcoin to other altcoins isn't really a worthy comparison as altcoins will dry out at some point. their value will be -95% to -100% over time.
"Their value will be -95% to -100% over time". However, the supply of new scam coins will always be there.