Via Nasdaq's Alex Lielacher,

The digital currency bitcoin rallied by over 300 percent since the start of the year and has recently surpassed the $4,000 mark. Unsurprisingly, many financial markets pundits consider such a sharp rally the creation of an asset bubble.

In all fairness, the returns that bitcoin and its digital peers in the crypto assets space are experiencing have not been seen since the day and age of the internet bubble in the late 1990s. However, Bitcoin has very different fundamentals than early internet stocks and a much more promising growth trajectory.

1. The Growing Acceptance of Bitcoin as Legal Tender

One of Bitcoin's biggest challenges so far has been acceptance by lawmakers and financial regulators due to its decentralized nature and its unfortunate association with criminal activities carried out on the dark web. However, Bitcoin's "official" acceptance is on the rise.

In April 2017, Japan announced that it would officially begin accepting Bitcoin as a legal payment method, which immediately boosted the price of bitcoin and has led to a substantial increase in merchant adoption across Japan.