Source: Coingecko
The light blue line is the price in USD. So when SUI started in 2023, it was already at $1.40. Then it was dumped down to $0,40. When the Bitcoin bull market intensified, it went again up, this time reaching its ATH in March 2024 (2.15$ approximately). Then it went down again and now it's close to its ATH again. We have thus a typical altcoin with large swings, but lately a bit of growth.
However, if we look at the price of SUI/BTC (orange line), the evolution looks much less positive. It started at 0.000048 BTC. Now it's at only 0.000032 BTC.
For the "Ethereum killer" narrative also the price in ETH (violet line) is important. ETH as we all know didn't perform that well. And while SUI was able to grow a bit versus its start in 2023, the growth wasn't exactly impressive: it went from 0.00073 to 0.00084.