It is not safe if you invest your all money it would be too risky, because the price of bitcoin is volatile so we don't know if the high price rate for today will remain the same in the next day, but if you have a great urge and your ready for what would be the result in your invest money, well it's your choice. But for my opinion if you've have doubts in investing your money I suggest to invest a small amount of your bitcoin so that it wouldn't a big lose on your savings, because we aren't sure if your investment will return the 100% of your profit.