My friend decided to sell his car and invest all the money in Bitcoin as some people predict that 1 BTC will reach 500 000$ till the end of 2019.
He totally believes in it and tells that then he could buy not only a new car but a flat also.
Does it really worth it? He uses his car for his work and now he wouldn't be able to do this anymore as he thinks there's no need to work anymore.
This is a completely unreasonable and inappropriate act. Whatever you believe in Bitcoin it is not wise to invest money that is devoted to everyday life, you need to invest money that is not needed to your daily life.