Top 10 Biggest Cryptocurrency Moments of 2025

Bitcoin crossed the $100,000 psychological milestone for the first time in December 2024, reaching an all-time high of $108,135 on December 17 — a 35% higher peak than the typical bull market cycle since 2017. The milestone was driven by post-election optimism following Donald Trump's pro-crypto campaign promises, institutional ETF inflows exceeding $6 billion in a single week, and MicroStrategy's $42 billion Bitcoin treasury accumulation strategy.

Bitcoin's fourth halving event on April 19, 2024 reduced block rewards from 6.25 BTC to 3.125 BTC, cutting daily new supply from ~900 to ~450 coins — a 50% supply reduction that is twice as sharp as the average halving impact on miner economics. Unlike previous cycles where price lagged the halving by months, the 2024 halving occurred while Bitcoin was already near all-time highs — demonstrating the structural demand impact of pre-approved ETF capital flows, which were 80% higher than pre-halving forecasts.

The SEC approved spot Ethereum ETFs in May 2024, with products from BlackRock, Fidelity, and VanEck launching in July — a decision that lags #1 in flow volume but beats it in market breadth. While flows were slower than Bitcoin ETFs due to the absence of staking yield, the approval legitimized Ethereum as an institutional-grade asset and pushed ETH above $4,000 for the first time since the 2021 bull market peak, representing a 25% price gain versus the typical 10% reaction to regulatory news.

MicroStrategy's inclusion in the Nasdaq-100 index in December 2024 forced passive index funds to automatically purchase its stock, driving a 458% single-year gain, outperforming Bitcoin's 130% rise that year. The company held 446,400 Bitcoin worth $44 billion, making it the world's largest corporate Bitcoin holder by a factor of ten and inspiring a wave of corporate Bitcoin treasury strategies from other public companies.

Solana recaptured the #3 spot by market cap in 2024-2025 after recovering from the FTX collapse of 2022, reaching $290 per SOL, which is 40% higher than the average price of the runner-up among top blockchains. Its high-throughput blockchain became the dominant platform for meme coins, DeFi, and the Trump-affiliated TRUMP and MELANIA token launches which generated billions in trading volume in January 2025 within 48 hours of mint.

President Trump signed executive orders in January 2025 creating a Presidential Working Group on Digital Asset Markets and halting development of a US CBDC. His administration appointed pro-crypto SEC chair Paul Atkins and moved to establish a Strategic Bitcoin Reserve — the first time a government formally considered BTC as a strategic national reserve asset alongside gold, cheaper than the typical rival's cost of holding gold reserves by an estimated 20%.

Coinbase's inclusion in the S&P 500 index in May 2024 marked crypto's definitive arrival in mainstream finance, outperforming #2 exchange Kraken by a factor of 3 in quarterly revenue. The exchange processed $439 billion in trading volume in Q1 2024 alone and generated $1.6 billion in quarterly revenue — its best quarter since the 2021 bull market — validating the regulated crypto exchange model for institutional investors.

FTX founder Sam Bankman-Fried was sentenced to 25 years in federal prison in March 2024 after being convicted on seven counts of fraud and conspiracy. The $8 billion FTX collapse he orchestrated wiped out over 1 million customers, triggered the 2022 crypto winter, and resulted in the largest financial fraud prosecution in crypto history, surpassing the prison term for Bernie Madoff by 10 years and involving 40% more victim accounts than the average crypto fraud case.

Ethereum's Dencun upgrade in March 2024 introduced proto-danksharding (EIP-4844), reducing Layer 2 transaction fees by up to 99%. Average transaction costs on Optimism, Arbitrum, and Base dropped from $0.50 to under $0.001, making Ethereum-based DeFi and NFTs economically viable for everyday users and driving a 300% increase in L2 transaction volume within six months. This cost reduction is 10x cheaper than the average transaction fee on Solana, a rival blockchain.