If you have 1000 USD, maybe adjust the investment with your funds. If you invest in bitcoin or ethereum, it's already expensive and the profits won't be too much. You can buy coins that are not too expensive, such as ADA, WAVES, BNB and other coins that have good potential in the future. But remember altcoins sometimes if it has gone high you have to sell it, because to go high again sometimes have to wait for altcoin season or have to wait for bitcoin bullish.