At some point, the coin's market cap becomes large enough to absorb the (theoretical) big digs without much damage. It could be rough in the early days, but if the fundamentals are good, things will be fine long term.
The digs are only part of the problem. The potential for the digs also weighs on the coin. The digs add supply which dilutes the value of individual holders (which is fine to a degree, though too quickly causes instability and turns off backers). The potential for big digs will only go away if all the coins are dug, which most of us agree will never happen. But that risk is there and nobody has a plan for it except wait for the supply to balloon enough to devalue the undug supply.