Not necessarily. Miners who mine ethereum are mining for idealogical reasons, and lose money to do so. As the cost to support this mining increase (in part due

Not necessarily. Miners who mine ethereum are mining for idealogical reasons, and lose money to do so. As the cost to support this mining increase (in part due to the size of the Ethereum chain) it's reasonable that they will stop mining (thus bringing security to the potato), and/or prune the blockchain and stop hosting for free.