Winklevoss brothers invested $11 million when 1 bitcoin is amounted to around $120. An now it soared to over $10,000, that investment could be something.
Actually, that wild bull run made quite a lot of millionnaires as well. We're now all aware of the facebook twins becoming the first btc billionnaires but a lot more recently broke through the 6 digit column. I wish i could say the same for myself but if 2018 would continue the pace bitcoin is taking now, more would break through the millionnaire circle