A popular crypto analyst says he will buy the altcoins Polygon (MATIC), Cosmos (ATOM), Avalanche (AVAX), Concordium (CCD) and SKALE (SKL) as he anticipates a relief rally for the market. Michaël van de Poppe tells his 619,400 Twitter followers he is stocking up on altcoins that could give him 20 to 60X returns on investment.