The evidence strongly and directly supports the statement that major cryptocurrencies showed both increases and decreases in a recent, specific time period. There are no contradictions among the provided sources. Several sources confirm price decreases. A Bloomberg article explicitly mentions a 'Bitcoin Drop.' A post from the authoritative data source CoinMarketCap reports a 'sharp sell-off' for Bitcoin and Ethereum over the 'past 30 days.' Another article from Decrypt notes Bitcoin and Ethereum 'falling more than 20%' within the same 30-day period. This collection of sources firmly establishes the 'decreases' aspect of the statement.Crucially, direct evidence also confirms price increases within the same recent period. A source from Changelly, a crypto exchange, provides specific metrics for XRP over the 'last 30 days,' stating it experienced 11 'green days' (days where the price increased). Similarly, a source from CoinCodex reports that Ethereum had 12 'green days' in the last 30 days. These two sources provide explicit, quantitative evidence of price increases for major cryptocurrencies.Since there is direct, consistent, and specific evidence from multiple sources for both price increases ('green days') and price decreases ('drop,' 'sell-off') within the same recent timeframe ('last 30 days'), the statement is assessed as being true with a high degree of confidence.