For #1 — there seems to be a strong need on both the retail side (folks who are day-trading or casually investing on the side) and on the institutional side (e.g. cryptocurrency hedge funds, etc.). So far we have focused on the retail use case

For #4 — there are a lot of possibilities here, and a lot of it will depend on where our users guide us. Some areas that we will start testing with soon though are around roboinvesting, trade aggregation, and auditing. Would really welcome your thoughts and ideas here as well!