If it were me, I'd buy 200 more Dash and start my own masternode. I think of masternodes as financial life rafts for the future. The price of a masternode is about $13k, and is starting to exceed the price of a good used car. The days of affordable masternodes may be drawing to a close. That's OK because masternode shares are available. It's just safer in the long run to manage your own.

PrivateSend does have a potentially serious flaw.

Each coinjoin requires a server to facilitate the mixing. This requires users to trust that the server is not recording details on where each user's outputs are ending up. Dash attempts to mitigate this risk by using what they call "masternodes". Masternodes are the servers which coordinate PrivateSend. These masternodes require a deposit of 1000 Dash to run. In theory, this collateral prevents someone from creating an arbitrary number of nodes for the purpose of recording coinjoin details.

Does this really mitigate the risk of coinjoin details being recorded, enabling transactions to be traced? Not reliably. The reality is that the majority of masternodes are hosted by a small number of VPS providers. These VPS providers could easily record the transactions being facilitated by any masternode that they host.