The cryptocurrency market boasts several key milestones, and one of the most notable is the market cap sizes of various cryptocurrencies. While some cryptocurrencies have market caps of around $1 billion, others reach staggering figures of $5 billion, $10 billion, $50 billion, or even $100 billion. High-volume altcoins are particularly known to reach this $100 billion mark. These levels hold significant importance, as evidenced by the all-time highs achieved by cryptocurrencies. Consequently, it is only natural to closely examine the top 5 altcoins in relation to these levels. Interestingly, two of these altcoins stand out as they come much closer to reaching the mentioned market cap level compared to their competitors.