No doubt, Bitcoin is a great retirement option. But it isn't really hassle-free. It isn't actually 100% smooth and convenient all the time as you may want to portray it. It has its own share of hassles so to speak.
Bitcoin isn't really just inside your pocket and you don't need to do anything to use it. You will probably have to convert some, so you still have to deal with the banks and other third parties. There might still be delays and other glitches.
Bitcoin is also not an anytime money. Its volatility means there are good and bad times to transact.
As to possible threats and harm, you're actually not free from them just because you use Bitcoin.
My point is that while Bitcoin indeed makes our life better, it doesn't actually make it ideal.
i agreed with your point it,s better to secure future with bitcoin with high possibility. bitcoin is volatile that,s why we should be multiple chances to trade on it to make double portfolio via trading. yes of course it sometime alot of movement in price to generate huge money. on the other ways people making high profit with crypto in bull run. they have vision as long term to make high passive returns
I also agree with the points made by the op, and I also think this is a good idea, because one day we will all become old, of course, the necessities of life must always be there.
and if we apply the system as op said, of course there is nothing wrong as long as we invest in btc by first knowing the risks of long-term investment in btc.
but it would be even better if we invest in btc for our retirement funds in old age, plus retirees from other things.
so we don't rely too much on btc because we won't know the price of btc for the long term like the next 30 years and so on.