Not most art. The top end of it perhaps. Meanwhile there’s a very fragile infrastructure of mid range galleries and artists whose works don’t fall into the investment driven, guaranteed income, secondary market end of things. Lockdown has brought about a massive democratisation of things with artists selling their own works direct at very low prices (see the #artistsupportpledge for example).
Most gallerists worth their salt show a direct interest in the ‘collector’s’ relationships with the work they’re buying and would advise against buying anything for investment without having a creative interest in the work / artist themselves.