Bitcoin is a real asset you can invest all your money and have something good to achieve at the end of the investment that will make you feel happy that you have a huge amount of money with you already.
For the love of God, do not invest all of your money in bitcoin, it is too risky to do, invest what you can afford to lose or your spare money, it is a long term investment and your profit will probably come in the long term, so it is unwise to invest with a lump sum, you either use your spare money or you buy with dollar cost averaging.