I think the bar for "actually using bitcoin" is higher than only holding your own keys; at minimum, you must have supervision, or even exclusive control, of some parts of verification.... otherwise, you might hold keys generated privately from your offline wxBitcoin and share the address publicly, only for your grandchildren to discover that your idiot friend sent bcash to the address that was valid on both chains.

I have relatively strong opinions about whether certain dubious practices¹ fall within the range of mature and respectable "use of bitcoin", however I realise that there are so many quirks and features accumulated in the decade-plus that the system has been suffering through its very own tragedy of the commons, that I consider some of them open to debate.