@rtrtcrypto - be careful what you wish for, it may come true. There is a very good chance you will end up with much a higher stake with the conversion than you would with 25% airdrop. Lisk will have to raise around 2300 BTC to lower your stake from conversion to what it would be with a 25% airdrop. You're better off with the conversion unless the ICO really goes through the roof.
Actually he'd still be better off with the conversion even if the ICO goes through the roof, as that extra BTC invested would logically lead to better marketing, better devs, and a much higher price. Or worst case, a ton of buying pressure/interest after the ICO.
The potential problem with the ICO is if it doesn't bring in a lot of BTC. Then XCR people will have a higher stake (at least compared to if the ICO did super well), but not enough volume/interest to cash it out.
The upside of the sharedrop is it guarantees a fixed stake in the event the ICO is very successful. This also incentivizes XCR holders to promote the ICO since the more that is raised, the better for XCR holders since it raises the valuation of their holdings without diluting them. The downside is XCR holders end up with a lower stake than with conversion below a certain threshold of raised BTC.
The upside of conversion is XCR holders end up with a higher stake if the success ICO is more typical of ICOs in general or even weak. The downside of conversion is it can incentivize some short-sighted XCR holders to try to undermine the ICO effort so they end up with a higher stake.