But this time feels different. It feels like a bubble. The fever in the post-Thanksgiving moonshot ran hotter than we’d seen before. We also began to see a robust supply response.
Long-term holders, who have held their Bitcoin for more than 12 months, are reluctant to spend their coins, according to Glassnode’s “The Week On-Chain” report. Another positive is that investors continue to withdraw coins from centralized exchanges whose share of supply has dropped to a new record low at 12.9%.

Bhambhwani, S., S. Delikouras, and G. M. Korniotis (2019). “Do fundamentals drive cryptocurrency prices?”, Working paper .
The BraveNewCoin aggregated index is chosen as the source of data for Bitcoin, Ethereum and Monero. The BraveNewCoin aggregated index is not used for Litecoin as their index for Litecoin only starts in April 2014 and misses earlier price action. Instead, Litecoin data is retrieved from the BTC-E time series. It should be noted BTC-E has recently (25th July 2017) been shut down by US authorities, however this is after the data interval examined. It has been observed that price differences do exist between cryptocurrency exchanges [19], and it is expected the BTC-E price over time will be different to other exchanges, however with the possibility of exchange arbitrage, prices on different exchanges are reasonably similar.