Stocks and bitcoin are similar in their level of being unable to have #2. If you own a majority stake in a company you still don't get anything that represents that (maybe a piece of paper that'll take you 4 months to a year to sell if the company is valuable enough).

Gold and most metals are hard to divide too in the same way, divisibility trumps physical representation imo and likely will for a long time. A newer version of a Casascius coin could resolve the "no physical representation" part but I don't know if the technology to make them fully tamper proof is complete (the hologram for a cas coin was suggested to come off without a trace if it was mixed with a solution).