Oh yes someone can, bitcoin is a speculative asset but when you look at it on a long term scale, you will see that it is already getting a massive adoption rate and on an overall uptrend. Beginning to invest in bitcoin from now as a retirement plan will give you a very big advantage to have own a lot of bitcoin when you’ve retired and want to live on your savings henceforth. Bitcoin has proven to be a reliable assets that have played the role that other assets have done for the past years. It has also breach the gap of facing natural disasters that happen upon physical assets that people have been using to save their money for the long term before the invention of bitcoin.
there are still so many investments you can do if you don’t want to dive in to real estate
True, but if one of your investment is in bitcoin, then diversifying should be out of cryptocurrency and not go and invest more in other altcoins. Some altcoins have really performed well since their creation but you can’t depend on them forever as bitcoin is dependable on. They are much risky than bitcoin, so in order to have a safer investment, it is better you diversify into other investments like real estate, gold etc. With bitcoin investment, you are in a safer haven when it comes to cryptocurrency investment, so you don’t need to panic to invest in other crypto asset with the mindset that bitcoin won’t perform well in the long run after investing in it.