I contacted Sasha Ivanov, founder of Waves, about the linked address 1NGfrU4YNp8dox1gLeUDyjD5Vpfck9no5j that has 4800 BTC from Waves ICO. His response was that if the project is successful, he is going to distribute our coin as dividend to Waves holders.
So, even the largest (so far) whale in our distribution is a kind of collective investment entity.
Could it become a potential threat for the Byteball system if the parties like Waves and Lisk and others will hold 10% of byteball for a fairly long time and won't distribute the coins to their investors, especially when they are in competition with Byteball? It may be not a bad idea to block their BTC addresses for the next distribution round if they don't distribute their coins from this round to their investors before the next round.