Lisk will probably be the last one they will use. General speaking, it will be fiat first, then BTC, ETH and Lisk
Did they announced that or you're just speculating?
because what you said doesnt make any sense to me... even tho lisk could be a good "investment", they shouldnt be holding... too risky.
As a companie, they need to have the majority of their funds in a "secure" currency/coin like btc and FIAT.
ETH/LISK and any other crypto deserves a small amount but it cant be big.