I speculatively bought some Monero, but I don't feel the same way about Monero that I feel about Bitcoin. The privacy that Monero enables comes at a cost. Supposedly you can tell how many coins exist, you just don't know which address owns them. But logically that doesn't make sense to me, so I haven't been willing to put enough work into understanding it. And it also makes sense to me that bitcoin would adopt that feature if its value was worth the cost, since all crypto are open source by necessity.