Crypto market veteran DonWedge has advised investors to hold onto their top altcoins amid the current market compression phase. According to DonWedge, a long-term chart indicates that the total market cap outside the top 10 coins has been forming a narrowing wedge since 2018, currently standing at approximately 6.6%. He suggests that this could potentially rise to 16%. DonWedge warns that selling altcoins now could be a mistake, as significant altcoin rotations typically begin when the crypto market's dominance appears weak rather than strong. This insight suggests that investors might benefit from maintaining their positions in anticipation of a potential market shift.