(Our weekly analysis of the wild world of cryptocurrencies. Repeats for additional subscribers)

By Lisa Pauline Mattackal and Medha Singh

July 12 (Reuters) - The shrimps of the crypto world have joined the whales in a glorious last stand to banish the bleak bitcoin winter.

These two contrasting groups are both HODLers - investors in bitcoin as a long-term proposition who refuse to sell their holdings - and they are determined to drive back the bears, despite their portfolios being deep in the red.

Shrimps, investors that hold less than 1 bitcoin, are collectively adding to their balance at a rate of 60,460 bitcoin per month, the most aggressive rate in history, according to an analysis by data firm Glassnode.

Whales, those with more than 1,000 bitcoin, were adding 140,000 coins per month, the highest rate since January 2021.

"The market is approaching a HODLer-led regime," Glassnode said in a note, referring to the cohort whose name emerged years ago from a trader misspelling "hold" on an online forum.

After bitcoin's worst month in 11 years in June, the decline appears to have abated as transaction demand seemed to be moving sideways, according to Glassnode, indicating a stagnation of new entrants and a probable retention of a base-load of users, ie HODLers.

Bitcoin has been hovering around $19,000 to $21,000 over the past four weeks, less than a third of its $69,000 peak in 2021.

"There is a saying in crypto markets - diamond hands. You've not really lost the money, if you've not pulled out. There may be a day it might come back up," said Neo, the online alias of a 26-year old graphic designer at a fintech company in Bangalore.

As the crypto bear market enters its eighth month, his crypto portfolio was down by 70% - though he said it was money he was "okay with losing". He does not intend to sell, holding out for a possible rebound in the coming years.

Like Neo, most HODLer portfolios are under water, yet many are refusing to bail.

Some 55% of U.S.-based crypto retail investors held their investments in response to the recent selloff, while around 16% of investors globally increased their crypto exposure in June, according a survey of retail investors by eToro.

"Crypto is an asset class disproportionately held by younger investors who are more risk tolerant since they have, say, 30 more years to earn it all back," said Ben Laidler, eToro's global markets strategist.

MINERS' PAINS

Another class of staunch crypto HODLers - bitcoin miners - is increasingly under pressure as they face the double whammy of cratering prices and high electricity costs. The cost of mining a bitcoin is higher than the digital assets' price for some miners, Citi analyst Joseph Ayoub said.