Bitcoin is popular among huge population all over the world while the demand for altcoins is limited. Does this mean there is least effect of whale manipulation on bitcoin among all crypto coins ?
I would say the opposite than your saying. Bitcoin has biggest marketcap and dominate the cryptocurrency market but I believe there are more people who don't use Bitcoin but use altcoins or invest in altcoins. They don't actually make good decisions because altcoins are more risky for either trading or investment. Holding altcoins in a bear market in one market cycle, which lasts about 2 years is very terrible.
Bitcoin can have 70% or 80% correction from its all time high but altcoins have deeper corrections, 90% or 99%. Many of altcoin projects die in bear market because altcoin developers are more easily to abandon their projects, and wait for new trends to create new projects.
I agree with what Catenaccio has just said and in addition to what he as said from my opinion, many people will buy BTC during the bear season while many will be skeptical to buying altcoins during bear season because the tendency of BTC price correction is higher than altcoins, hence, altcoins even depends on BTC rising price to also rise and when the timing is longer at bear season they may move to coin grave yard and cease existing.