Just known that whatever means you choose to save you money with, it should be well secured. We have heard of many Bitcoin wallets hack here on the forum. But just because we haven't seen one and don't pray for such, doesn't mean its not possible with Bitcoin. Make sure to keep your keys safe and away from the reach of others and the internet. Again. You can diversify your savings into two.nits even better that way so if one goes wrong, you can have something to fall back on. If you choose banks in Nigeria for savings then make sure you use those standard banks that have big branchs and head offices here in the country.. if it's crypto then keep your keys safe. Just remember anything if possible when it comes to hacking or losing of funds. But that's not our portion..
My brother you have spoken well, in as much as it's very much more beneficial to save your money in anything that appreciate in value overtime and Bitcoin is one of those asset that appreciate in value overtime, which to me, it's the real deal, but on the aspect of security, my brother, that is left for you, your Bitcoin can be easily stolen if you reveal your secret phase to the wrong person, so don't just think that once you save in Bitcoin, your security is guaranteed, no it doesn't works like that.
You have to be protective of your asset by writing your secret phase on a piece of paper and keep it in somewhere private where no other person except you can have access to.
Then lastly, concerning your Bitcoin holdings, I know that it's very difficult to do, but try not to react to the market, because you might sell too early or sell in panic if their is a strong dip, so as long as you are holding for long term purpose, try to sell only when your investment goal have been met, not selling for minimal gains or at a loss due to panic.