On a year-to-date basis, bitcoin ( BTC-USD ) has erased all of its losses since the collapse of FTX ( FTT-USD ) late last year, but some cryptocurrency-market investors don't appear to trust the stability of the recent rally. Indeed, inflows for investment products that allow investors to bet on lower bitcoin ( BTC-USD ) prices totaled $25.5M in the week ended Jan. 20, marking the largest weekly inflow since the $51M mark in July 2022, according to a recent CoinShares report. Since the start of 2023, bitcoin ( BTC-USD ) has surged 37% to $22.83K and ethereum ( ETH-USD ) jumped 33.6% to $1.62K. The upswings coincide with the stock market's ( SP500 ) 4.8% run-up and the tech-heavy Nasdaq's ( COMP.IND ) 8.7% climb, as market participants become more confident that inflation has passed its peak. Overall, digital asset investment products last week saw inflows of $37M, 68% of which was into short investment products, the report noted. Trading activity was exceptionally high at $1.6B, topping the 90-day average, with bitcoin ( BTC-USD ) accounting for 80% of that total. While investors grew more bearish on bitcoin ( BTC-USD ), altcoins such as ether ( ETH-USD ) ($4.2M), polkadot ( DOT-USD ) ($1.0M), cardano ( ADA-USD ) ($0.6M), ripple ( XRP-USD ) ($0.6M) and avalanche ( AVAX-USD ) ($0.5M) saw inflows for the week. Seeking Alpha contributor pointed out seven factors for bitcoin ( BTC-USD ) investors to watch out for in 2023 .