According to @WatcherGuru, Coinbase CEO Brian Armstrong said investors do not need to buy a full BTC or ETH to begin and can start with just a few dollars, adding it is never too late (source: @WatcherGuru on X, Oct 19, 2025). For traders, this underscores that small-size, fractional BTC and ETH purchases can be used to build positions gradually with limited capital during volatile conditions (source: @WatcherGuru on X, Oct 19, 2025).