a lot of people are using auto algo switch tools, so when pricing go down, their miners just automatically switch to other algos, and when pricing go up, the miners then switch back...
for example...mingpoolhub...
https://miningpoolhub.com/?page=statistics&action=autoswitches
AUTO SWITCHES
You can mine coins based on best profit reward automatically by setting Auto Switch to your workers using hub.
Connect your miner to appropriate algorightm port(12XXX) and set auto switch on "Hub Workers" page.