Should we do DCA strategy for emergency funds for many years?

In anything you do man never you use emergency funds to ongoingly invest in bitcoin. Emergency can come anytime it fucking want, imo it dosen't even care whether you have what it takes to handle it. Bitcoin has a volatile behavior and the price fluctuates anyhow, so in the short time the value of the price can go down and reduce the value of the amount of emergency money you put inside it. And when the time for you to use your emergency funds comes, and you want to withdraw from bitcoin, and you might now notice that the amount you put inside bitcoin might not be what is still there.

The value will have dropped down .It is nothing strange, that is how bitcoin is, this is why it is never smart to use bitcoin for emergency funds. Invest only in Bitcoin when you are investing for long time, and then use local currency for saving your emergency funds.