As per the current market situation, many good coins are falling due to dot, cake and many other reasons. I would suggest buy cake, sol, and such coins for at least 5k amount, and soon those coins will return high profit margin
Long-term investment, of course, means that we will keep the coin for a long time, and the coin we choose must be both safe and non-destructive. These are the top coins on the Coinmarketcap list that I selected; Bitcoin, Ethereum, and BNB are the most viable Cryptocurrency coins, and are safe to invest in over time. What's more, these three coins have a prospective worth that's quite high.