The only way to find it is ask his bitcoin address. Obviously you can't know how and when he will buy the bitcoin. But if he feel bitcoin is dropped lot from his buying price, he will announce it on public if he already bought bitcoin to hope it pump. Just like he did when bitcoin dropped below $40,000 back then
I do not think it would be in one bag and in his personal wallet,,, This was a company so for sure they bought it and put it in multisig accounts maybe even under custody of some insurance backed company like Bitgo. Saylor is one man and we all remember what supposedly happened when 1 man died and Quadriga exchange lost everything right?