> I need $20B to buy ITER, $19B to buy WhatsApp, and $11B to buy the LHC

No, you could say that it would cost you $20B to build a copy of ITER -- very different. You can't buy ITER for what was paid to build it. Or maybe you can. We have no idea because the valuation is unknown. The project is so risky, we're spreading the cost around 35 countries. If we thought it was more of a sure thing, every country would be trying to build their own. Many companies, too.