Couple of quick questions.

1.  You refer to 2 managers.  I assume you're one - who are the other 2?

2.  What happens as far as dividends and voting are concerned whilst only some shares are sold?  If those are allocated as though all shares had been sold then it would be impossible to pass any motion until at least 25001 shares had been sold - making it impossible to function at all.  Really you should issue 100,000 shares on ONE platform and take 50k yourself (or split with other managers) with a contractual obligation to abstain on votes with your shares if you don't intend to vote.  Then dividends would scale properly with sales - and vote would be possible from the start.  Sales on other platforms would then be pass-throughs where you'd end the votes ahead of on main platform and proxy the votes in.

Selling different batches of same company on different platforms sounds great until a problem arises.  There's various issues that could cause controversy - e.g. exchange-rate conversions meaning sales on a platform actually occurred at the 'wrong' price, failure/hacking of one platform with loss of funds (do investors on other platforms have to take losses made on a platform shares weren't even for sale on when they invested?)

I think 10k+ BTC is a big ask for a website without any customers yet : to get any sort of trade justifying that you're going to need pretty good systems for depositing/withdrawing fiat (the BTC/USD and BTC/EUR pairs would have to generate bulk of trade - as there just isn't enough market cap in the alt currencies to generate profits justifying the price tag). What deposit/wihtdrawal methods are you intending to strat with?  Do you intend to require AML/KYC information from anyone depositing or withdrawing fiat?  Quick calculations show that to pay even 10% dividends per year you'd need to be handling a fair few million USD/EUR in deposits/withdrawals - that's the sort of size of transaction that it's hard to slide under the radar in most countries.