Bitcoin tops 43% in the third quarter, second-highest total since 2013.

What's this about?

Quarterly earnings data cited by CoinGlass states that Bitcoin (BTC) gained about 43% in the third quarter of 2026, making its three-quarter returns second highest since 89,000, with the first being Q3 2017, which saw an increase of 80.41%.

For those of you who aren't familiar with financial terms, the third quarter is from July to September. The monthly returns are the change in price or value between the beginning and end of a quarter, not the profit on each purchase made by an individual investor.

Why is the number 43% so striking?

An increase of about 43% in a single quarter makes Q3 2026 the most outstanding quarter in Bitcoin's history ((BTC) since 2013) The importance is here: the market isn't just looking up or down, but comparing how this quarter was stronger or weaker than previous quarters.

If you look at the record, it's still a quarter away from 2017, which is 80.41%, but higher than three quarters of some years that have been leaping upwards, like 2013, which has gone up by 89,000, and 69,0007, which went up by 98,000.

What's happened in the past three quarters?

When comparing specific 3rd quarters of different years, the data collected by CoinGlass indicates that bitcoin ((BTC) has had the following returns:

• Year 2013: increased to 40.60%.
• Year 2017: increased to 80.41%
• The year 2021: increase to 25.01%.
• The year 2020: increase to 17.97%
• The year 2014: decreased to 39.74%.
• The year 2019: decreased to 22.86%.

As you can see, the third quarter has not always been a smooth one; some years were stronger than others, but other years have seen significant declines in value.

Why wait till the end of this quarter?

Although current figures indicate that an increase of about 43% puts the third-quarter 2026 at its second highest level since 2013, the third quarter will end on September 30, so final returns and rankings relative to the past may change.

This is the point where readers should distinguish between interim and quarter-end statistics, because digital asset markets are highly volatile; changes in a few days at the end of the quarter may cause the final numbers to differ from those reported earlier.

What is the impact on readers in Thailand and Myanmar?

For Thai readers, Bitcoin (((BTC) and digital assets are often tracked through platforms that operate under the auspices of the SEC (Thailand) such as Bitkub allowing users to view information as a price in baht ( THB ) or comparable value in local currencies.

In a broader context, market observers in Thailand and Myanmar may be interested in this data because it helps to see how the third quarter of Bitcoin was strong or weak compared with the past but does not mean that all users will see the same returns. Capital costs, long-term holdings and currency conversion rates make each person's experience different.

Something to understand before reading the return statistics.

What this article says is a statistical fact: the third quarter of 2026 for Bitcoin ((BTC) had an increase of about 43% according to CoinGlass data, and if that number stays up until the end of the quarter it will be second highest since 2013 as opposed to the 3rd quarter in 2017 which increased by 80.41%.

Meanwhile, the quarter ends on September 30, and in the past three quarters we've had both very good years and negative years like 2013 went up 40.60%, 2021 went down 25.01%, 2020 went up 17.97%, whereas 2014 went down 89,012, and 2019 went down 22.86%.

This is a description of the information, not a recommendation to buy or sell.