Bitcoin is suitable for short, medium and long term users. If we take a look at the life of a trader this appreciation is fulfilled. In the midst of the pandemic, Bitcoin showed that it could rise and continue to recover its price in the market with a good forecast. So it is a guarantee in the uncertain future.
It's because crypto sphere cannot correlate directly to the happenings in the world economy. That's why you may noticed that btc keep on soaring despite of the declining economy of nations. They are different fields after all

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Anyway, with regards to the second one, for me I'm still not 100% that bitcoin can guarantee your future. Look, it's price is as volatile as hell and you can't assure that it can maintain its stability when the next crisis comes. Take tome to consider the slow adoption and oppositions of it. Don't get me wrong, I love bitcoin but always mind that don't be so complacent because anything could happen