The crypto market weakened on Monday, September 28, with Bitcoin and Ethereum each falling 2%, but Quant (QNT), Bitway (BTW) and XDC Network (XDC) posted sharp gains among CoinGecko's top 100 cryptocurrencies. Quant led the group, rising 32.85% to $238.2 and extending its weekly gain to 260%. Its rally began on September 24 after The Clearing House selected Quant to operate its US tokenized deposit network, scheduled to open in the first half of 2027. The Clearing House is owned by 25 of the largest US banks, while Barclays, HSBC UK and NatWest completed live tokenized sterling payments on Quant's platform the same day. QNT remains about 47% below its September 2021 record of $427.42. Bitway, a Bitcoin-focused layer-1 blockchain, gained 28.3% to $1.38 after reaching an all-time high of $1.43 earlier Monday. Its weekly advance reached 75% and its market capitalization rose to $3.7 billion. No listing or protocol announcement emerged to explain the move, although the Bitway Booster Season 5 campaign on Binance Wallet runs through October 2 and broader altcoin rotation may also have contributed. Blockchain Center's Altcoin Season Index stood at 59, above the sub-25 readings seen in July but still in neutral territory; it last moved out of Bitcoin Season on September 2. XDC rose 11.66% over 24 hours to $0.034, taking its weekly gain to 20%. The opening of Sibos in Miami, a SWIFT-run banking conference continuing through October 1, provided a near-term focus, with XDC Network and Contour teams attending. Validator additions involving South Korean custody firm DSRV and Belgian tokenization firm SettleMint, along with XDC's July launch of XDC AI, also supported the narrative. The rallies face immediate tests as Bitway's campaign ends October 2 and Sibos closes October 1. Quant has the strongest backing among the three, but its price is running ahead of live volume because The Clearing House network will not open until 2027. All three assets also remain exposed to weakness in the wider market.