A tail emission is a healthy thing. It allows the network to remain secure in the absence of a backlog of high-fee paying transactions, which is what Bitcoin relies on for security once the block subsidy becomes insignificant.

The single reason why Dogecoin can't reach $50k is that it would imply a $6500 trillion marketcap.

Already at $7.7 it would reach a $1 trillion marketcap, so there's just not much room for price to grow.