Freebitco had 4% APY on Bitcoin deposits and was considered amazing. Even Binance has lower APY on Bitcoin as I remember. I understand your concern, it doesn't look amazing because they can fall anytime but Bitcoin is the gold of cryptocurrencies and long-term 4% APY means a lot. Bitcoin can increase 2-3 times and higher, so your 30-60% APY will easily become 60-120, 90-180 or higher APY.
Btw 60% APY on USDT is amazing for those who prefer less risky investments. USDT is not volatile and you know that your 60% is almost guaranteed unless something terrible happens like USDT going down to zero like TerraUSD.
That's right, it's a huge difference, it's a practically guaranteed investment, just like investments in traditional banks or other applications. 60% APY is incredible for those who don't want to take too many risks (trades, bets, etc.), this is one of BetFury's fascinating differences.
The only downside is that you have to be willing to wait and keep your balance blocked for 365 days for a 60% APY (fixed-term).