Regarding selling pressure, dont compare altcoins with equities which are giving out dividends. Equities exist for an existent company not some vaporware shitcoin, these two are not comparable when it comes to legitimacy.
Hence people never trust altcoins, because they are failures from the start and can never compete with the mainstream counterparts on a large scale - bitter truth of the altcoin ecosystem.
Now, about selling pressure, dont assume that staking would give you the ease of mind of not having to see -10% on that price ticker one day. Bag holders dont care about the staking money, they want people to buy or be forced to buy in the context that they are staking so that they can sell their bags.
Trust me, staking vs selling at high, the second option is way more profitable for any trader. So think twice before doing staking. It is always better to just buy coins at low and then sell them at high. Problem lies in that fact that people dont time it correctly or have patience to watch the market.