Monero is hugely popular with illegal traders and criminals. That makes it a target for law enforcing agencies and buying and selling of it is made harder by the agencies and are not listed in most of popular centralized exchange. Even if it's harder to trade, it's still the most used privacy coin. Personally I, and most of other traders and investors don't require monero for their strategy as we have nothing to hide and want to avoid any unnecessary trouble with the agencies. Monero is a good coin for many but it's just a trouble for most.