Each and every investment involves certain level of risk and bitcoin is no exception, do your own research and depending on that you can invest your money but make sure that you don't invest all your money only in bitcoins or else it will be a huge risk.

I think it will survive as a cryptocurrency. I had imagine in this 100 years Quantum computing will become common at some time so it will have to be rewritten to increase the computing complexity. But, I won't rule out that it could be difficult to rewrite so something new can replace it

As long as internet is intact, bitcoin will survive.
Probably bitcoin will be the most-used or the base of currencies in the world when that time comes.

Bitcoin was experiment and it seems that it had showed many features and enough information to governments to design their own digital currencies. That is of course how the title of this thread say Bitcoin is a successful edition in its limited way.

People are using Bitcoin because they want to try a new payment method and that would be nice for the future because everything is also getting more digital so that is nice.

I like best about bitcoin is its very convenient to use. I can earn  even if i'm just at home. I don't need some license to earn bitcoin. And bitcoin can be use in many ways like gambling or buying some digital goods online. I also use it to top-up my mobile phone and also my friends and relatives.

Appropriate advice from a lot of friends, investing is a consideration for me to have a bitcoin. When many investments that many are having problems then I select the bitcoin.

Because cash is a friendly user rather than bitcoin, also in every country paper money is more usable than bitcoin due to legalization of paper money. However, hoping someday bitcoin will become more easy to use than paper money.