# Underlying Asset Price Variation > **Warning:** We currently support RedStone Oracle for underlying asset price feeds. BitFi plans to integrate more underlying asset oracles in the future. > **Note:** Due to the requirements of quantitative strategies, bfBTC currently does not support WBTC as a deposit asset. The following content is for reference only. Different underlying assets are used for deposits on different chains: * **Bitcoin:** BTC * **Ethereum:** WBTC * **Binance Smart Chain:** BTCB * **Bitlayer:** BTC (native token/gas token) * **Hemi:** hemiBTC On Bitcoin, Ceffu mirrors BTC assets to the exchange at a 1:1 ratio. Ideally, depositing 1 BTC yields bfBTC based on the ratio corresponding to 1 BTC. Binance Smart Chain's BTCB is backed by Binance at a 1:1 exchange rate. Depositing 1 BTCB yields bfBTC based on the ratio corresponding to 1 BTC (1 BTCB = 1 BTC). * HemiBTC (on Hemi Network) and Bitlayer BTC (on Bitlayer) are each 1:1 pegged to Bitcoin, with: * 1 HemiBTC = 1 BTC * 1 Bitlayer BTC = 1 BTC Ethereum's WBTC has price fluctuations; deposits are calculated based on the Redstone Oracle price. --- # Agent Instructions: Querying This Documentation If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question. Perform an HTTP GET request on the current page URL with the `ask` query parameter: ``` GET https://bitfi-2.gitbook.io/bitfi/developer/epoch-and-ratio/underlying-asset-price-variation.md?ask= ``` The question should be specific, self-contained, and written in natural language. The response will contain a direct answer to the question and relevant excerpts and sources from the documentation. Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.