A Wyoming science teacher, Jack Maddox, made life-changing investments in cryptocurrencies.He invested $500 in Stellar (XLM) and made $185,000 in a year.He then invested $1,000 in Shiba Inu (SHIB) and turned it into $7.9 million.Now, he sees potential in BlockDAG (BDAG) and plans to invest $10,000.