Bitcoin’s downturn has ended, according to Michael Saylor, but analysts add important caveats.

Debate is intensifying over whether bitcoin’s latest rebound marks the end of the crypto winter, as industry voices split on the strength and sustainability of the move.

Michael Saylor, executive chairman of Strategy (MSTR) and the largest corporate holder of bitcoin, declared on X that the “winter is over” after BTC held above $78,000—a level first reached earlier this week. His comments came alongside a stylized, Game of Thrones-inspired image and followed another major purchase, with Strategy adding 13,927 BTC to bring its total holdings to 780,897.

Not all analysts share that optimism.

“Even if bitcoin’s winter is over—which I’m not convinced of—it’s still very cold for altcoins,” said Jason Fernandes, co-founder of AdLunam.

Mati Greenspan, founder of Quantum Economics and former senior analyst at eToro, offered a different perspective, arguing that the market has not experienced a true winter at all. Instead, he characterized recent volatility as a correction within a broader uptrend.

“What we’ve seen is more of a sizable pullback inside a continuing bull market,” Greenspan said.

Despite the differing interpretations, Greenspan agrees with the broader implication behind Saylor’s call—that bitcoin may have already found its bottom and could trend higher from here.

Analysts say Strategy’s continued accumulation underscores a structural shift in the market, with corporate treasury adoption playing a growing role in bitcoin’s price dynamics. This phase is increasingly defined by institutional participation and long-term capital.

Still, Greenspan believes the next major catalyst has yet to fully emerge.

“Institutional adoption will help drive the next phase, but the real inflection point will come with nation-state adoption,” he said.

He outlined bitcoin’s evolution through three major adoption cycles: early adopters in 2013, the retail-driven surge of 2017, and institutional entry beginning in 2021. The next stage, he argues, will be defined by sovereign participation.

“The fourth major wave is nation-state adoption, and it may arrive sooner than expected, particularly given shifting policy signals in the U.S.,” Greenspan said.

He added that central banks could eventually incorporate bitcoin into their reserves, much like gold, as a tool for maintaining financial stability.

Early signs of that transition are already visible. The U.S. is exploring the idea of a strategic bitcoin reserve and holds an estimated 300,000 BTC. El Salvador continues its steady accumulation strategy, while China and the U.K. maintain sizable holdings. At the regional level, public institutions such as pension funds in Wisconsin and New Jersey have begun gaining exposure to bitcoin.

Taken together, these developments point to a potential new phase for bitcoin—one increasingly shaped by sovereign adoption alongside institutional demand.