It is too early to decide if it is a bull run season but if btc rise above 35k$ maybe that was the start of the bull run season again, for now we still have yo wait a little more or we can still buy some more altcoin as a preparation of the possible bull run season just invest an amount that we can afford to loss.
Why do you have to buy altcoins to prepare for a bullrun when what is being awaited for a bullrun is Bitcoin? Indeed, in general altcoins also get a good increase in bull run conditions as has happened in 2021, but the most important thing here is to take advantage of this moment by having more Bitcoins even though it would not be wrong if someone has more altcoins in their wallet as long as the altcoins are is an altcoin that is already very popular in the market.
Some traders or investors have reasons from their analysis to buy altcoins before the bullrun, they don't ignore Bitcoin investment advice but due to limited funds they buy altcoins because top altcoins have higher profits during bullrun periods, but any altcoin is not guaranteed to pump during bullish periods hence there is a high risk to be considered for potential altcoin options, but good advice to share investment for halves in top bitcoin and altcoins for the purpose of recovering losses with bitcoin and altcoin investments to get high profit opportunities.