If it is about securing the future, then without doubt it is the safest way to enjoy the future. What we save today will surely help us in the future.
I can agree that investing in crypto is the way to help our financial strength in the future. But I don't think it is the safest way, investing in crypto has a high risk, no one knows what to happen to crypto investment in the future. That's why we don't invest all our money in crypto, just use the money that we can afford to lose. Put all money in crypto investment isn't the right way to secure our future.
I agree that owning cryptocurrency assets is one way to make us safer in the future, but let's see what assets we have. Is it a coin that does have a bright future or vice versa? Because even though I get profits here, but not infrequently I also feel a loss due to my lack of caution. And I agree it is better to invest only in the form of money that we are prepared to lose.