Kevin O'Leary said he is investing millions of dollars in rare sports cards, arguing that the scarcest pieces are a legitimate alternative asset class that can behave more like fine art than mass-market memorabilia. He said his strategy is to buy only 10 to 20 exceptional cards, hold them for the long term and view a 3% to 5% allocation as sensible for investors seeking assets less correlated with stocks and digital currencies, while warning that ordinary cards tend to stagnate. O'Leary said some unique cards have historically outperformed the S&P 500, gold and crypto. The move fits his broader emphasis on diversification, position limits and long-term compounding. In digital assets, Bitcoin and Ethereum made up 90% of his crypto portfolio by April 2026 after he exited altcoins following the October 2025 crash; he has also said Bitcoin may remain range-bound between $80,000 and $200,000 and could still reach $150,000 to $200,000 if clearer U.S. regulations spur institutional adoption.