My two higher-risk investments are:

1) PRL+SHL

Mainnet this month, revolutionary concept of monetizing web pages without ads by using miniscule amount of CPU power of users (few percent, same as displaying an animated ad basically) and secure IOTA based storage for users, potential of running a hook or broker node based on IOTA node to make even more profit.

2) ATL

Unique building tokenization (Propy and other "building-based" blockchains do something else).

They are extremely regulatory oriented and strive to provide fully legal solution. I am from Europe so holding ATL long-term and running a node has a chance to give a very good profit to me. 7% worth of all buildings tokenized on the platform per year is given to node providers. So there is possible profit of at least several dollars per one ATL token per year if only 2B USD building were tokenized on the platform - if you look how much one shopping centre costs (2 stories, 5000m^2 about 30M USD), really no big deal to get to 2B USD with 40-50 large buildings. A con is that you cannot run a node if you are not from Europe now (until regulatory things will get cleared in other countries but currently the team wants to launch in Europe to keep everything legal).

Currently both PRL+SHL and ATL are very cheap and promising alts in months to come.