I think it's NEO and ICX. I really enjoyed these 2 altcoins, it was once shocked by the crypto market in terms of growth in late 2017 and their technology.
but recently, it has not had any growth or fluctuations. There is also little news about it. I think they are in the process of researching and developing something and coming up, it will be the whale pump price coin up high.
I never heard of ICX but NEO is a centralized coin and it can be manipulate anytime either the whales are involve or not. However, The whales usually accumulate bitcoin and they also accumulate some decentralized altcoin either but the way to know the coins they accumulate by watching the capital market, any coins which make some unbelievable pump in price is definitely manipulated and there's possibility that the whales are involve.