Core Insights - Cryptocurrencies can be a beneficial addition to retirement savings in small doses, with a suggested allocation of no more than 5% of the portfolio, as some top coins have significantly outperformed the stock market [1] Group 1: Dogecoin - Dogecoin, launched in 2013 as the first meme coin, gained popularity due to its humorous characteristics and interest from figures like Elon Musk [3][4] - The cryptocurrency reached an all-time high of $0.74 in 2021 but has since lost over 80% of its value, highlighting its volatility and lack of legitimate use cases compared to more established cryptocurrencies [4][7] Group 2: Ethereum Classic - Ethereum Classic emerged from a major hack of the Ethereum blockchain in 2016, where $50 million in tokens were stolen, leading to a split in the community [5] - Ethereum has significantly outperformed Ethereum Classic, with a market value of $362 billion compared to Ethereum Classic's $2 billion, and respective gains of 21,200% and 662% since inception [6] - The total value locked (TVL) in Ethereum protocols is $70 billion, representing 64% of the TVL across all blockchains, while Ethereum Classic has only about $208,000 in TVL, indicating a lack of activity and investment [8]

Security Incident - Monero (XMR) experienced a 51% attack in August, achieved with only 35.7% hashrate through block withholding tricks [1] - The market reaction to the attack on Monero was perceived as treating it like a minor bug [1] - Following the attack, Kraken suspended deposits, multiple exchanges halted withdrawals, and developers discussed abandoning RandomX [1] Market Impact - XMR price dropped 13.8% following the attack [1] - Ethereum Classic (ETC) dropped 30% and Bitcoin Gold (BTG) dropped 50% after their respective attacks [1] - XMR was trading at $260, seemingly unaffected by the security model failure [1]