I think you've picked a winner with Ardor. It has a solid history with the NXT platform (Ardor essentially being NXT 2.0). The advent of child chains, bundlers and forging all bring a fresh and new perspective in regards to handling blockchain bloat issues.

Most people including myself were off put with its circulating supply (1billion) but you soon realize that its adoption/use case is what really matters.

I bought at 0.09 and sold at 0.20, so I am absolutely kicking myself. I do intend to buy back in asap and hold more long term (3+ years at least).

LTC is a good hold too. IOTA is another I sold earlier (mind you most people did not expect as big a bull run as what took place in recent weeks!). Would hold and follow closely with their progress but also watch the miss information being spread (partnerships etc).

Anyway just keep stacking that Ardor because as I said it has history and a use case in the blockchain industry thats much needed at the moment.