Be careful if you invest in altcoin, you need to find which altcoin that will be good as the investment. As long as you can choose from the top 50 coin list, you will see the chance for the coin to increase will wide open. And that will depend on how much money you will use to buy the coin. But I think you can buy bitcoin again if you still have money in your wallet especially if bitcoin price can get down below than $9k. I agree that if bitcoin now is at $10k is a gift to every people because bitcoin can increase higher in the future.