If you look further back on the charts you'll see (for example)...

If you look further back on the charts you'll see (for example) PLA went from $0.10 to $3.15 in less than two years and the others did similar. 3000% gains stand to be corrected. There's no such bubbliness about MMB's price. Despite excellent drill results its still only modestly higher than its float price. The world's biggest platinum miner Anglo paid 60c less than a month ago. Its cheap - with platinum prices also bottoming out.