Every individual have their own perception towards investment. While some individuals prefer to keep all their eggs in one basket, some prefers to use more baskets for their eggs. Diversified portfolio is the best practice followed by the industry. That may not work well for crypto because the crypto market is too bitcoin centric. Everything follows the path of bitcoin so it makes sense to put all your money into bitcoin. But for reak world, it's always best to diversify to save your investment from risks. But it's again a personal choice!