Glassnode : the last time we saw this amount of Bitcoin that had not moved in over a year, was in early 2016 – preceding $BTC's bull run to $20k!

That is from their Twitter : https://twitter.com/glassnode/status/1277235618918129666

Supply last active 1+ years

Also, as the market trades at yearly highs, over 83.6% of the Bitcoin coin supply are now held in profit, but Bitcoin HODLers just refuse to sell.

Long-Term Holder (LTH) supply has been continuously hitting new all-time highs since November 2022, reaching 14.9M BTC at the time of writing. Conversely, Short-Term Holder (STH) supply has declined to 2.3M BTC, which is effectively a new all-time low.

https://insights.glassnode.com/the-week-onchain-week-47-2023/