By the turn of the 20th century, the great Stroganov fortune had been divided amongst the heirs of the last Count (principally his grandaughters :- Princess Scherbatova & Madame Rodzianko -nee Princess Galitzine). This left the Youssoupoff fortune with few if any rivals.
I'm afraid your quite wrong. The Stroganoff, along with Yusupovs, Sheremetev, and Romanov defied Russian tradition of dividing wealth equally amongst all heirs.
The last Count Sergei Alexandrovich Stroganoff born 1818 died 1864, left his entire wealth to his youngest sister Princess Olga Scherbatova-Stroganova, who inturn left it to no one because the revolution interupted, Princess Olga Scherbatova-Stroganova was the last steward of the Stroganoff Fortune. Your assertion that the Stroganoffs would break with approximately 300 years of family tradition by dispersing wealth equally is suspicious to say the least.
"the fact is that the Tsars personal fortune in 1917 was barely double the amount what his neice Irina had been promised as a annuity in her marriage contract of 1914 !!!!! "
This statement also seems boderline daft. Irina was not an important member of the Romanov Dynasty. If she were, there would have been no marriage to a Yusupov.
""30,00" million is a ridiculous amount. Back to my point ,it was all "Potential" wealth."
I hate to tell you but potential wealth counts. For example, you presumably own a house worth, for arguments sake lets say your house is worth $900,000 (the price you paid for it). You put it on the market and after 4 years no one makes an offer....is your house worthless?
The reality of the Tsars wealth is.....far from simple. You appear to assess his wealth as though he were a private individual, he wasn't. In his
example you cannot
separate his wealth from state wealth.
I'm also well aware Peter the Great tried tried to start to make such a distiction, so we are left with two choices...
1. There is a distiction between state and personal wealth. Which means the Tsar was not
2 There is infact no such distinction. State wealth is Tsars wealth. Tsar was infact an autocrat.
Futher more, the resources we have to even make a somewhat educated estimation of the wealth of pre revolutionary Russians is futile as we haven't enough unbiased, unchallengeable sources.
"The lost Fortune of the Tsars" by Clarke = Challengeable
"The Aristocracy in Europe 1851-1911" Dominic Lieven =Challengeable
Former Aristocrats memories = Challengeable (They tend to inflate fortunes value)
Most = Challengeable
The Statement and account balances of The State Archives of The State Bank of The Russian Empire during the governance of I.P. Shipov = unchallengeable, but would only be a starting point. Then assets ( Art, Property, Jewels etc...) with pre revolutionary evaluations. Then add them together....anything short of this is pure speculation based on very little.