Saving money on a long-term period of time has several ways, but if you are asking how to have savings here in Bitcoin or crypto world for what I did actually, every time there is a profit I received whether it is from trading or bounty campaigns I automatic segregate the 15% on my earnings then place and keep it on my offline wallet like hardware wallet or cold wallet then hold it in a long term.
I had also do that method but i end up spending my savings because of some emergency cases that arise.But i still want to save again for my future because there is no assurance that your body will always be fit, and you can't work anymore too because of the old age already.
just keep it in the wallet we have and we always make sure that our monitor is safe, and we always open it in the hope that no hackers hack it.