Bitcoin is still on track to hit a price of $1.5 million by 2030.If you’re interested in where crypto could be headed in 2025, then the new “Big Ideas 2025” report from Ark Invest is a must-read. It lays out what could be coming next for cryptocurrencies, stablecoins, decentralized finance (DeFi) platforms, and smart contract blockchain networks.But the really incredible news involves Bitcoin (BTC -2.65%). As Cathie Wood of Ark Invest points out in the report, Bitcoin is still on track to hit a price target of $1.5 million by 2030. If she’s right, investing in Bitcoin now could be one of the best possible moves you could make for your crypto portfolio.Bitcoin’s growth trajectoryRight now, Bitcoin appears to be firing on all cylinders. Hitting a price of $100,000 last year was a landmark event not just for Bitcoin, but also for the entire crypto industry. That’s because Bitcoin accounts for a staggering 60% of the crypto market’s total value. So if Bitcoin is headed higher, it’s taking the entire crypto industry with it.There are several key factors sending Bitcoin higher. One factor, of course, is Bitcoin’s continued integration into the global financial system. Just the fact that the U.S. government is now seriously contemplating the formation of a strategic Bitcoin reserve tells you all you need to know.Another factor involves the sound fundamentals of the Bitcoin blockchain. By just about any metric, Bitcoin continues to shine. Daily transaction volume, for example, is now at record levels. The total hash rate (which measures how much computing power is being used) is at an all-time high. And the number of investors who have held their Bitcoin for more than three years is at record levels, too.Bitcoin also has been the beneficiary of growing institutional adoption. It has become an asset class of its own, and has become a favorite of hedge fund managers and institutional investors looking for crypto exposure. As a result of the success of the new spot Bitcoin ETFs, the percentage of a portfolio that these investors are willing to allocate to Bitcoin continues to increase.Bitcoin’s path to $1.5 millionAfter detailing all the accomplishments of Bitcoin in 2024, Cathie Wood delivers the big news: Bitcoin is still on pace to hit a price of $1.5 million by 2030. To make that a reality, Bitcoin must grow at a compound annual growth rate (CAGR) of 58% for the next few years.For most assets, that type of CAGR would be unthinkable. But not for Bitcoin. Consider that Bitcoin delivered returns of 122% last year, after delivering returns of 150% in 2023. If anything, a CAGR of 58% might be underestimating Bitcoin’s growth trajectory over the next several years.Image source: Getty Images.That being said, it’s worth exploring some of the key assumptions that went into the $1.5 million price prediction. Unlike the typical pie-in-the-sky crypto price prediction, Ark Invest’s prediction is actually grounded in some key assumptions about what is happening withi