It is a calculated sidestep. Bitstack, known as the first Bitcoin savings app in France (MiCA-licensed since June 2025), is launching Bitstack Boost on June 23, a euro yield product offering 2.51% net of fees.
The service is built on the Spiko Amundi Overnight Swap Fund (SAFO). CACEIS (part of the Crédit Agricole group) provides custody for the funds. The yield is derived from the rate at which European banks lend to each other overnight (the €STR), to which BNP Paribas adds a small premium under a swap agreement with the Amundi fund.
For an app whose DNA is Bitcoin, offering a euro yield may seem counterintuitive. But Alexandre Roubaud, co-founder and CEO of Bitstack, fully stands by the logic of the move. "We opened a euro account for our clients, particularly for the Bitstack card. It was only natural not to let that money sit idle," he explains. "If you deposit euros to then save in Bitcoin, great. But if you leave them there because you sold Bitcoin or to use the card, at the very least, we should put your money to work."
Why Spiko, and why not dollar exposure?
The choice of vehicle is an interesting one. Bitstack ruled out dollar-denominated products (such as tokenized US Treasury bills) in favor of a purely euro-based product. "There is FX rate exposure with dollars. People don't hold dollars; you have to explain to them that they will convert, that their dollars will be invested... It is less consistent with the goal of fitting into their everyday financial lives," Alexandre Roubaud explains.
The choice of Spiko is no accident. The ACPR-licensed investment firm, co-founded by Paul-Adrien Hyppolite, now manages over €1.5 billion in assets through its infrastructure. Its API enables third-party platforms like Bitstack to integrate institutional-grade investment products.
Yield, and then what?
Bitstack Boost is just one step. Roubaud outlines a broader roadmap in which stablecoins and tokenized assets are set to play a growing role. "We can envision, for some of our clients, generating yield on their bitcoin or converting into stablecoins and seeking yield there," he says, while emphasizing the inherent risks, particularly around decentralized finance protocols. "That doesn't mean we won't offer them, but the risk has to be managed. Our role will be to offer several products that cater to different risk profiles."
On the timeline front, the company plans to open its card (instant round-ups, 1% cashback in Bitcoin) to all its clients starting July 1. International expansion, launched in early 2026, has already crossed the 10,000-client mark outside France, although Alexandre Roubaud acknowledges that moving from national champion to European player involves "local nuances" and "challenges" around the marketing message.
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