@loo Depends what your goals are. Where do you want to be living? Two separate decisions, investment vs lifestyle.
Considering you're single and family may not be a short-term need, you could look into A) and/or D) buying a house as an investment (with the idea this could be a house you would live in, in the future), and stay living in the apartment.
In the meantime, there's nothing wrong with setting up a regular contribution into shares, or even using house equity to do it (debt recycling is not necessarily a strategy at this point, considering you're fully offset and have no non-deductible debt any longer).