If you are partly doubting on this move then you just have to invest what you afford to lose. When bitcoin hit $19,000 I never imagined that it will go back again to $6,000 but we did see it. Test yourself, learn the charts so that you are comfortable with what you are doing. Remember that it is your money, others may try to encourage you that this is the best time to buy and I'm one of it but the decision will still depend on how you are sure with what you are doing.