Privacy coins, for sure. Monero is a good one; it's a good store of wealth and great for large transactions. SpectreCoin is another high quality privacy coin, and is valued at a lot less than Monero is right now despite having such great privacy technology (and it'll get more, too, including being the first coin ever to have stealth staking). You can find out more about SpectreCoin by visiting the CoinWiki (my signature), or by visiting the project's Slack channel (https://spectreproject.slack.com). The Slack channel is very active with a lot of helpful community members and a very responsive lead developer.